







A range hood 
20171204 

Chuck pose la question : I'm building a custom range hood and can't seem to get the angles correct where the front and side panels intersect.
I saw a similar post but there's no way I can do the calculations for a Wolfram Alpha!
Here are the dimensions that I have (in inches)...
Base  Front 29 7/16" x side 19 3/16"
Top  Front 10" x side 9"
Front Panel Length (from base to top on an angle) 21"
Side Panel Length (from base to top on an angle)  17 9/16"
Vertical distance from the base to the top 14 1/4 inches.
Any help finding the bevel/miter of the two front corners where the sides meet the front panel would be greatly appreciated.
I will need the angle for the saw in degrees.
Thank you in advance!
Regards,
Chuck Harley Weston lui répond. 





Volume of liquid remaining in a tilted cylinder 
20161108 

Brian pose la question : I am trying to determine the amount of a liquid remaining in a 55 gallon drum when it is tilted at 45 degrees and the liquid level is low enough so that the liquid does not completely cover the bottom of the drum.
Your help is greatly appreciated. Harley Weston lui répond. 





A barn roof 
20160529 

Joe pose la question : Is it possible to build a barn roof (irregular pentagon?) with a 12' base and the other 4 sides 4' each? Thanks. Penny Nom lui répond. 





The volume of a truncated rectangular pyramidal pond 
20160513 

Paul pose la question : How do you calculate a partially filled truncated rectangular pyramid if you always know the bottom rectangle, the maximum height top rectangle perimeter, but have a varying height. Similar to filling up a pond you know the current height and dimensions at the max rectangle how do you calculate it half full i.e. 10x30 outside perimeter with a 2x8 base and a max height of 6ft how do you calculate it at 3ft without remeasuring the top perimeter.
Thanks,
Paul Harley Weston lui répond. 





A deck that is half an ellipse 
20160228 

Steve pose la question : On your website, I was reading a question and your response from a girl named Angela in which you provided a formula by which her father, a welder, could figure out points on an arc corresponding to equal 3' intervals on a 30' chord where the vertex was 1' off the chord. Is there an equivalent formula when working with an ellipse? I suspect this change will make the calculations significantly more complex. I am building a deck that is half an oval, and would like to be able to mark out the perimeter by measuring the distance from regular intervals on the primary access to a corresponding point on the perimeter. I will then connect the points on the perimeter and cut a reasonably smooth arc. The length of the primary access will be 22' and width of the deck at the vertex is 9'. I would like to be able to know the distance from the primary axis to a point on the perimeter at equal intervals of 6" along the primary axis. Can you help? Penny Nom lui répond. 





Shooting a ball at a target 
20160216 

Thys pose la question : Hi
I have a problem with the formula that i use .(for programming)
I have looked all over the web to find a solution but no luck.
I have a cannon that shoots a ball at a target
I use this formula to calculate what my initial velocity must be to hit the target
at a angle of 30 degrees and a distance of 15m (the cannon and target position is known)
It works perfectly if both is at same height but if one is higher or lower it miss.
In an example I am working with the range is 30m, the angle is 45 degrees and the target is 10m higher than my position.
Please help
Formula = V0 = √RG / Sin(2α) Harley Weston lui répond. 





Roof Square footage 
20151111 

Todd pose la question :
Question from Todd:
Good Day.
I have to figure out the square footage of a quonset style roof that's not playing by the rules The building dimensions (rectangular) are 63'x135' the height of the roof is 9.25'. It not an entire Quonset, It's that style of roof,(curved). There are concrete block walls 10' up to the metal roof.
Thank you!
Todd Harley Weston lui répond. 





The diameter and circumference of a circle 
20150901 

Tracey pose la question : Hello,
I own a custom workroom, I am figuring out fabric quantities or an estimate. When
at the job site, I forgot to measure the diameter of the semi circle shape that I have to
make a cushion for!!!
If the circumference of the semi circle is 165" what would the diameter be, maybe half
this measurement????
I appreciate any help...I basically need the width from left to right to see if I can fit
the cushion on one width of fabric that is 52" wide! Penny Nom lui répond. 





Filling a pool with dirt 
20150501 

Mike pose la question : I have a hole which a 24 ft pool in it is 10" deep in the the centre and goes to 1" inch at the edge want to fill it in with dirt how many yards of dirt would I need to fill it in Penny Nom lui répond. 





A wireless fence 
20150418 

Dave pose la question : I'm buying a wireless fence to keep my pet in my yard. It has a half acre range. In a straight line how far would that be? Penny Nom lui répond. 





A fishfinder 
20150313 

Dave pose la question : I have a fishfinder that has a 20 degree cone on bottom of boat going to the bottom of the lake.
How do I know the size of base diameter of the cone on the lake bottom depending on depth...
such as 10 feet deep, for example? Penny Nom lui répond. 





The length of a ramp 
20150305 

Jaylynn pose la question : Hi, I've been trying to figure out how long my ramp would have to be in order to reach a height of 3.5 feet at a 30 degree angle for a sugar glider enclosure? Penny Nom lui répond. 





Bricks around a fire pit 
20150305 

Jayson pose la question : I have a round fire pit. It measures 25 inches in diameter. I have 12 inch long square bricks to go around it . My question is what degree do I cut the ends of these bricks to make them fit around this circle? The brick dimensions are 12"Lx6"Wx4"D. Harley Weston lui répond. 





Stopping distance 
20150211 

Audrey pose la question : A Harley Davidson motor cycle weighing 650 lbs with a rider weighing 175 bs
was going 40 miles per hour. He had to make a sudden stop . Slammed on brakes. How long a distance for him to stop? Penny Nom lui répond. 





Logarithms 
20140828 

effaryna pose la question : how logarithms is applied in everyday life? Penny Nom lui répond. 





Cutting a round cake so that it doesn't dry out 
20140826 

James pose la question : I'm wondering if there's a simple way to calculate the area between two parallel chords of a circle equidistant from its diameter, or if I have the area, to find the distance between the two chords.
Here's my "problem". You may have heard of the way of cutting a round cake so that it doesn't dry out  make two parallel cuts (chords) the length of the cake, take the middle piece, then push the two pieces together.
So I know the area of a 12" cake, and I want say, exactly an eighth of the cake. How wide do I cut the centre piece?
Now to get even more difficult, the next day I want another eighth from the centre. How wide do I cut the next pieces, and so on...?
Thanks,
James Harley Weston lui répond. 





Covering a 12 inch by 12 inch square hole 
20140702 

Patricia pose la question : I am putting in a new bathroom fan. I am wondering if a new light with a 15 inch diameter will cover the existing square hole which is 12 by 12 inches? If the existing hole is 11 1/2 by 11 1/2 inches?
Also, if the 15 inch diameter does not cover the 12 by 12 hole, what size diameter would?
Thank you. Penny Nom lui répond. 





An oval pool 
20140621 

steve pose la question : I have a 16' x 28' oval pool that is buried 24" deep inground. The dig site is dug
2' wider all the way around the pool. I need to back fill this area with stone. I want to fill this area with 6 to 8"
of stone. How many tons of stone will this take?
Thanks you
Steve Penny Nom lui répond. 





How do we use logarithms in our daily life 
20140601 

ss pose la question : how do we use logarithms in our dailylife Penny Nom lui répond. 





An octagonal pad 
20140425 

George pose la question : Hi,
I need to pour a cement pad in the shape of an octagon that allows
for 12" of clearance around the tank I will be putting on it.
The tank has a radius of 16'. Penny Nom lui répond. 





The cost before the sales tax 
20140413 

Juanda pose la question : Hello,
I know the customer cost with tax and I know the sales tax.
How do I find out the customer cost prior to the added sales tax?
Thank you Penny Nom lui répond. 





A sand trench around a pool 
20140413 

steve pose la question : How sand is needed to back fill a trench around a 24ft dia. pool that is 26" deep by 2ft wide. Making the outside dia. 26ft.
Thank You Penny Nom lui répond. 





Decimals,fractions and percentages 
20140411 

Frances pose la question : Ask an expert to find out their real life usage of your topic... that is the question.
meaning what is your real life usage of using decimals,fractions and percentages.
This is all part of my math assignment to ask an expert real life usage... so please
reply back as soon as possible Penny Nom lui répond. 





Cutting a hexagon from a disk 
20140405 

Paul pose la question : I am a machinist and sometimes need to make a hex from
round material.
If I know the distance of the flat sides opposite one another
of my hex, how can I calculate the size of material I need to turn
to give me the right diameter to finish the part with six sides? Penny Nom lui répond. 





The area of a 5 sided lot 
20140315 

Michael pose la question : Question from michael:
This lot is in feet. 59x154x109x188x137 per the plot plan Harley Weston lui répond. 





Rolls of window film 
20140214 

Travis pose la question : This question is probably close to the same question as "roll of paper"
We have Rolls of Window Film that we are trying to figure out an equation for a spreadsheet that we can use to "inventory" our window film.
We use a caliper tool to measure the thickness of the roll in millimeters.
the core thickness = 1.90mm
Full Roll thickness(including core) = 9.08mm to 9.12mm
Film thickness = 0.06
Full Roll of Film is supposed to average 1200" of film
What equation could we use to get the approximate inches left remaining on the roll if we measured the roll including the core with the Caliper tool in Millimeters? Harley Weston lui répond. 





Conics 
20140201 

Kassidy pose la question : Hey, I have searched through all the questions about conics and how
people use them in the real world, but none of them were very specific
on how they are applied and the process, why it's so important etc.
I have a project due asking these questions and it's been very difficult
finding the right answer, if you could name jobs, how they are use and
specifically applied that would be greatly appreciated. Penny Nom lui répond. 





The fourth side of a quadrilateral 
20140123 

joanna pose la question : left vertical measurement 2560mm
right vertical measurement 1850mm
base horizontal measurement 1750mm
question  what will the 4th measurement be please.
using a scale drawing I make it approx 1900mm but require an accurate measurement
regards
Joanna Penny Nom lui répond. 





conical lamp stand/staved wood 
20131207 

Henry pose la question : need to make lamp stand that is wooden staved; need it to be 25 inches at bottom and 10 inches at top; need to know angles for staves to be cut; the lamp stand will be rounded on a lathe and will be 40 inches tall John Lucas built one and it is pictured on his web page. thank you for any help/direction; I checked out the answered for cone shaped objects on your page but didn't find what I could use. thanks again. Henrywoodturner, parent teacher student . . . . . Harley Weston lui répond. 





A square inscribed in a circle 
20131014 

Jenn pose la question : Hello! I am about to buy a 7'9" round rug, but I want to have it cut down into a square. What's the largest square I can obtain from this? Thank you! Penny Nom lui répond. 





GST and PST 
20130722 

Bev pose la question : Total sales revenues are 116391.38 this amount includes 5% GST and 80% of this amount includes a 7% provincial tax. The other 20% is PST exempt. GST is included in all. How do I figure the PST I owe? Penny Nom lui répond. 





Dirt to fill a pool 
20130713 

Neil pose la question : I had a 24 foot diameter pool. The perimeter of it was at ground
level. The pool sloped 1 foot deeper to the middle. In other
words "a 1 ft. dish. How many cubic yards of dirt do I need to
fill this hole? Penny Nom lui répond. 





Scheduling a 12 person fishing 
20130709 

Don pose la question : Greetings Math Central!
I searched the index, but could not find a similar quandary.
Here's my predicament:
I am seeking help in scheduling a 12 person fishing outing.
We have four boats.
I would like to schedule three fishermen to a boat.
We fish 2 1/2 days, split into morning and afternoon sessions.
Thursday afternoon, Friday morning, Friday afternoon, Saturday morning, and
Saturday afternoon
We switch boats after lunch, with each fisherman moving to a different boat,
with different partners.
I would like to have each fisherman fish with as many others in the group as
possible, with a minimum of partner duplication.
I would like to have each fisherman fish in all of the four different boats
over the course of the trip at least once.
Would you please suggest a boat / fishing partner schedule that fits my
parameters as closely as possible.
Thank you!
Don Victoria West lui répond. 





A kennel for a beagle 
20130603 

david pose la question : Hi, I'm building some beagle kennels and I am in need of help with an angle problem. I need to place a roof on my kennel with a drop of 2inches across 3ft 10inches. the posts on the right side will be 5ft and the post on the left will be 4ft 10in. the posts are 4x4 and the space to be covered is 3ft 10in from the outside of the 4x4. Please help, thanks. Penny Nom lui répond. 





How do i reverse this formula? 
20130420 

MK pose la question : I have 22,000,000 worth of gold and wants to want to resell the gold back with a profit.
Each transaction of gold will have a transaction fee of 15%, so if i resell the gold back at 22,000,000, I will only get back 18,700,000 after 15% transaction cut.
The current formula is X15%X = Y where X = 22,000,000 and Y = 18,700,000
Will u be able to come up with a new formula if we don't know the value of X but we know the value of Y
Something like this X15%X = 22,000,000.
How do i reverse this formula to find the value of X
Thanks Penny Nom lui répond. 





A gravel pile in the shape of a triangular pyramid 
20130404 

Casey pose la question : Hello
Right now I am stuck and I feel embarrassed because I feel like the answer is so easy I should know it.
I am working on a project and need to find a volume of gravel it will take to occupy this triangular prism like area. I am not sure what formulas I should use whether it be that for the volume of a pyramid or something more complex? Basically it forms a right triangle at one side then from there all points slope to one singular point about 10412mm away.
I am attaching a picture drawn up in paint with the actual dimensions to clear up any confusion.
Thank you for any help.
Casey Penny Nom lui répond. 





Question 
20130404 

Casey pose la question : Hello
Right now I am stuck and I feel embarrassed because I feel like the answer is so easy I should know it.
I am working on a project and need to find a volume of gravel it will take to occupy this triangular prism like area. I am not sure what formulas I should use whether it be that for the volume of a pyramid or something more complex? Basically it forms a right triangle at one side then from there all points slope to one singular point about 10412mm away.
I am attaching a picture drawn up in paint with the actual dimensions to clear up any confusion.
Thank you for any help.
Casey Penny Nom lui répond. 





What is the subtotal & GST? 
20130304 

REBECCA pose la question : Hi, I have a total of $300.
What is the subtotal & GST?
How do I work backwards? Penny Nom lui répond. 





Milling round stock to square stock 
20121217 

Bryan pose la question : Question from Bryan:
I want to know what the smallest diameter round is that will make a 31/4" square? Is there a formula for that? I am milling round stock into square.
Thank you. Harley Weston lui répond. 





Practical uses of trigonometry 
20121111 

Michael pose la question : Where can I find books or information on real life function of sine and cosine? Penny Nom lui répond. 





A label to cover a plastic cup 
20121023 

Kevin pose la question : I'm trying to make a label to cover the entire outer area or a plastic cup. I know there must be a way to figure out the dimensions needed, but I can't seem to figure it out. The circumference of the bottom of the cup is 21.4cm and the circumference at the top of the cup is 29.8cm. The cup is 14.5cm tall. What should the height of the arc from the plane connecting the two ends of the 21.4cm arc. I attached a diagram where x is the value I'm looking for. I'm guessing there is some simple relationship between the length of a line and the arc needed to turn that line into a perfect circle, but I don't know what it is. Can you figure this out and share it with me? Thanks.
Kevin Penny Nom lui répond. 





A tank with an inner walled compartment 
20121012 

don pose la question : I have a tank 20 feet diameter, 19' 8" tall with an inner walled compartment that has a 7' 6" radius arc with in the tank. I need to figure out the volume of the inner area and the volume of the larger area. Harley Weston lui répond. 





GST in New Zealand 
20121010 

Colleen pose la question : I work out my claimable gst each month but need to know the total sales or purchases amounts for filling in my six monthly paper work. How do I do that. I tried doing the opposite of calculating the gst i.e. x3 and /23 but it is slightly different to my total. Penny Nom lui répond. 





A profit of 35% 
20120907 

Jack pose la question : If a product cost me $10.00 and I want a profit of 35% what is my sell price? How do I figure the sale price to make a 35% profit on the sale? Penny Nom lui répond. 





The volume of fluid in a tank 
20120906 

Dave pose la question : I have vertical round flat bottom tanks of various dimensions. It is easy to find total volume but I would like to know how to figure out the coversion factor to go from how many centimeters of liquid is in the tank to the number of total cubic meters of volume. So if my float gauge on the tank says there is 50 cm of fluid in the tank, how many cubic meter of total volume is there? Harley Weston lui répond. 





A container of split peas 
20120906 

Laurie pose la question : I have a container that is 471 square inches (length*width) and is 2.3 inches high. I want to cover the bottom with 1/2 inch of split peas, in order to anchor escort cards (place cards) for a wedding. How many pounds of split peas do I need to cover the area to a height of 1/2 inch? Thanks Penny Nom lui répond. 





A schedule for 6 teams and 37 games 
20120829 

Giovanni pose la question : Hello, i try to prepare a schedules for 6 teams, and every teams will play 37 games before the playoff. How to make a schedules? thanks Victoria West lui répond. 





Making a wind sock 
20120828 

John pose la question : I am trying to build a wind sock and need to be able to lay the shape
out on cloth. I need the wind sock front opening (diameter) to be
3 1/2" and the rear opening diameter to be 1". The windsock needs
to be 9 1/2" long. I tried using the example of the person trying to
make a crayfish trap but got confused and could not figure out my
numbers. Any help would be greatly appreciated.
Thanks
John Penny Nom lui répond. 





A tapestry rod on a curved wall 
20120814 

Marlyn pose la question : I have a curved wall with a radius of 6'. I am trying to have a 36" rod made to hang a tapestry and need to figure out the degree measure of the arc.
Can you help me please? Penny Nom lui répond. 





A 10 inch circle using 2x4s 
20120519 

Ralph pose la question : I want to form a 10" circle with 4"high pieces of 2 x4's. If each 2x4 piece sit next to each other,What degree would I have to cut
each side of the 2x4's, and how many would I need to form a 10 inch circle. I know there is a formula for this out there somewhere. Harley Weston lui répond. 





Measuring the liquid in a horizontal tank 
20120228 

Philip pose la question : I have a steel gas tank that is 3' dia X 5' length. The total volume is 1000 litres.
But how much is left when I use a stick and measure 6" from the bottom or 12" or 24" ??
Is there a formula to use for this task?
Thanks. Harley Weston lui répond. 





Building a tipi 
20120129 

Lacy pose la question : Hi there!
We are building a tipi for our children. We want to build a large one about 15ft tall with a base of about 15 feet diameter. I am trying to figure out how much canvas we need to accomplish this. I graduated about 20 years ago and am struggling. Please help if you can. Penny Nom lui répond. 





The volume of a dugout 
20120128 

Jan pose la question : is there a formula for calculating the cubic yardage removed from a dugout
for example that is forty feet wide by one hundred and twenty feet long by
twelve feet deep with a three to one slope? It is the slope that makes it a
little tricky. Thank you. Penny Nom lui répond. 





Uses of logarithms 
20111109 

BEA pose la question : what is the use of logarithmic functions in real life or daily life? Penny Nom lui répond. 





Building a custom range hood 
20111008 

Bill pose la question : I'm building a custom range hood for a customer with special order material that matches
their newly installed cabinets and I need it to be perfect. The hood is basically a pyramid
but the 4th side is the flat wall at the back and a flat, rectangular top. I need to calculate
the bevel and miter of the three sides but I never was very good with geometry functions
(although I am fairly good with other math fields). I either need the calculations from you
at least (shudder) a formula or set of formulas so that I can calculate them myself. Harley Weston lui répond. 





Geometry Related Careers 
20110901 

Richard pose la question : Good morning,
I am hoping to find a list of careers that would relate to geometric constructions and tessellations.
I have searched the internet some and some of the sites I have found are a bit questionable or dated. Are there sites that Math Central would recommend?
I could not find anything when I did a search on the site.
Thanks in advance,
RVD Walter Whiteley lui répond. 





A stained glass lamp 
20110725 

Guy pose la question : Like Kay, I also work in stained glass, but in 3dimensions. I am
frequently asked to replicate lamp shades in stained glass where the
diameter of the top is different (narrower) from the diameter of the
bottom (which is wider). Some people want 5, 6, 7, 8, 10, 12, 16, ,,,
nsided shades. Is there a formula I can use to determine the width
of the sides using the angle, if I remember correctly, I think it's
called theta. In other words, is there a formula where I can plug
in the angle which describes the arc of the circle. For instance, if
someone asks for a 7 sided shade, plugging in 51.43 (360/7). I
could then use that to determine the width at the top and bottom
rings to create the appropriate trapezoids. I've visited a few sites
so the formula looks like its a function of sin & cos but they are
presented like proofs for teaching. Your site appears to want to
actually answer questions without making the inquirer feel stupid. Harley Weston lui répond. 





The height of a fluid in a horizontal tank 
20110724 

jason pose la question : Same set up as many others, cylindrical tank on its side, but I am interested in defining the change in volume and/or fluid level as a function of time at a constant volumetric outflow. I plan on hooking a pump to the tank so "gpms' will be constant. I have a couple different sized tanks and pumps so I want a general equation. Thanks for your help. Harley Weston lui répond. 





The length of a belt around three pulleys 
20110518 

Grant pose la question : I need to calculate the belt length around these pulleys, please can you
help or refer me?
Known variables
D  Large Pulley Diameter
d  Small Pulley Diameter
c  Center Distance between D and d
T  Tension Pulley Diameter
x  Horizontal Distance between T and d' Centers
y  Vertical Distance between T and d's Centers
I need to calculate the belt length around these pulleys.
Kind Regards,
Grant Harley Weston lui répond. 





How much gravel do I need to make it level? 
20110222 

Robert pose la question : I have an area that is 55 feet long x 75 feet wide and goes from 0 to 13 inches deep. How much gravel do I need to make it level? Penny Nom lui répond. 





Calibrating a conical tank 
20110205 

Bill pose la question : Hi, I have a round tank with tapered sides where I know the diameter at the top and bottom. Is there a formula I can use to calculate the volume by measuring from the bottom up the side (at the angle of the side) to any given point? Thanks, Bill Stephen La Rocque and Penny Nom lui répond. 





Daily life example of logarithms 
20110204 

owais pose la question : what are the application or daily life example of logarithms? Harley Weston lui répond. 





A fence around a water tank 
20110201 

Heath pose la question : I am building a fence around a water tank. the fence is to be in the shape of a normal octagon. The tank has a circumference of 57 ' 6''. I would like the fence to be 3 ft from the tank at the skinny point . How would I calculate(for the simple guy) where to set each of my 4x4 posts at the 8 corners. Any help would be greatly appreciated. Harley Weston lui répond. 





Exponential form 
20110102 

jumana pose la question : find any five examples of exponential form from real life situation Penny Nom lui répond. 





An air duct in the form of a circular cylinder 
20101219 

ed pose la question : an air duct in the form of a circular cylinder has a cross section if diameter 16 in. the distance between the bases is 20 ft and the elements are inclined at an angle of 50 degrees to the bases. find the amount of magnesia required to protect the duct with magnesia covering 1/2 in thick? tnx Stephen La Rocque lui répond. 





A punchcode lock box 
20101129 

Doug pose la question : I am a real estate agent that uses punchcode lock boxes on houses to store the keys. I need to crack the code on one of our boxes, so I need a list of the possible combinations.
Rules:
4 digit code
Numbers 09
Each number can only be used once
Order of the numbers does not matter.
With advice from this site, I have calculated that there should be 210 possibilities.
10x9x8x7 (5040) gives me the total number possibilities and 4x3x2x1 (24) gives me the total number of ways to arrange those numbers.
So if I divide the possibilities by the arrangement, I get 210. (5040 / 24 = 210) GREAT!!!
Now, how do I develop a list of those 210 combinations?
Thanks for your help. Robert Dawson lui répond. 





The slope of a hole 
20101028 

William pose la question : What is the slope of a hole that is 7.4 mm in dia by .5mm in depth. Penny Nom lui répond. 





20% profit on the selling price 
20100924 

ata pose la question : My cost is 100 and I want to make 20% profit on my selling price (not 20% of the cost). So, what should be calculation formula? Let's say my cost is 493.71 and I want to make 53.28% profit on the selling price; so how to determine the selling price? Penny Nom lui répond. 





A reverse PST calculation 
20100923 

Manning pose la question : Hi, I'm a manufacturing contractor in Saskatoon. The way to calculate PST for us is using total contract amount x 70% then 5%.
For example, contract amount of $100 x 70% x 5% = $3.5 (PST). The subtotal is using contract amount + PST.
$100 + $3.50 = $103.50.
If you only know the subtotal is $103.50 including PST, how do you reverse calculation to get the contract amount?
Thank you very much for your help. Harley Weston lui répond. 





Constructing a tipi 
20100920 

mike pose la question : we are thinking about making a lightweight tipi tent but we need to know what the angles and lengths of each side that we will need to cut. The height of the tipi wants to be about 2.2m span at the widest point wants to be about 3.2m we want to make it based upon a 6 sided(hexagon) shape thanks for your help Harley Weston lui répond. 





How are decimals used in every day life? 
20100901 

Keith pose la question : how are deciminal used in every day life Tyler Wood lui répond. 





A spaceship playhouse 
20100726 

Dave pose la question : I would like to build a spaceship playhouse for my grandson I want it to
be about 36" around and I want to use 5/4 decking boards that measure
5 1/2" wide how do I figure out how to lay out a base pattern to nail to
(what angle do I need to cut and how many boards will it take to go around
the circle. Penny Nom lui répond. 





The tonnage of some gravel 
20100722 

Gregory pose la question : i have a road that is 8 miles long 20 feet wide and 4 inches deep what is the tonnage for gravel i would need Penny Nom lui répond. 





An octagon shaped bench 
20100709 

rob pose la question : i am trying to build a octagon shaped bench to fit inside a 69 inch round hot tub so that the tip of each point touches the edge of the circle where it will be fastened. Stephen La Rocque lui répond. 





A play tent 
20100628 

Susan pose la question : Hi!!!
I am making a play tent as seen at the link below and need to figure out how to get the dimensions for the cone shape. The one shown has 4 different seams, but I guess I can get away with just one seam to sew it together (?) I need it to go over a hula hoop as that is what I am using for the round support at the top. My hula hoop is
35" in diameter from outside edge to outside edge. I would like the height of the teepee to be around 30" from the center to the peak.
Thanks so much, oh my gosh, I have been fretting for 2 days about this and my hair is about to fall out!!!!
Please contact me if you need any additional info.
~Susan
http://www.landofnod.com/family.aspx?c=52&f=4100 Penny Nom lui répond. 





Math in the workplace: nursing 
20100524 

Taylor pose la question : How is math used in the workplace  Nurse Anesthetist? Penny Nom lui répond. 





The low leg height of a shutter 
20100520 

brian pose la question : I work for a shutter company and am in need of a formula to figure
out what the low leg height would be if given the width of shutter,
the high point of arch top and the radius. example would be a 18" wide
shutter with a 80" high leg on the right side and a 30" radius. I would
need a way to figure what the low leg height (left side of shutter)
would be. Or if given width, low leg height and radius what the high
side would be? If any of this can be given in laymen's terms it would be
much appreciated.
Thanks,
Brian Harley Weston lui répond. 





Rolls of sod 
20100427 

judy pose la question : My yard is 35 feet by 29 feet. I want to put sod on the entire yard.
The rolls of sod are 9 square feet. How many rolls of sod will I
to complete the job? Penny Nom lui répond. 





Tiles 
20100425 

Pat pose la question : how many 6 inch tiles will I need to purchase for an area that is currently covered with 351 4 inch by 4 inch tiles.
Each box of 6 inch tiles states it contains 16 pieces and covers 4 square feet. Penny Nom lui répond. 





Commission 
20100424 

TAHIR pose la question : I want to predetermine the amount of commission on sale of my product which will be the amount that I shall have to pay .
For example, the price is $ 600and commission 5% .
1) I calculate commission on 600 @ 5% = $ 30
When added $ 600 the retail price = $ 630
2) But on $ 630, 5% commission = $ 31.50
So we make a loss of $ 1.50 .
3) Again if we add this $ 1.50 to $ 630 the price = 631.50
But the commission when calculated does not tally
and we make a loss of $ 0.075.
Please let me know how to determine the commission beforehand so that it matches our accounts. Penny Nom lui répond. 





Vapor trails 
20100412 

Frank pose la question : I'm not sure if this is a proper question to ask so if I have misdirected my question I apologize and no response is expected. I am trying to figure out a way to measure vapor trails from my back yard in Phoenix Arizona. If I used a compass and spread each point of the compass to the start and finish of the vapor trail I would have the angle of an isosceles triangle. The other two angles would be identical. The height of from the inverted base of the triangle to my standing spot on the ground would be about 35,000 feet. I'm thinking that there should be a way to figure out the length of the inverted base (vapor trail) but I'm devoid of mathematical skills and can't seem to figure out how to do this. Is it possible to figure out the length of a vapor trail using this method or do you have an easier way to accomplish the task?
Any help you could offer would be most appreciated.
Thanks....Frank Harley Weston lui répond. 





The area of a field of view 
20100407 

Frank pose la question : I know we have a field of view of 90 degrees and the distance we can cover is 6 miles. What is the area we can cover/view?
A formula would be nice to have since the diameter or distance of the wedge area can change and the degree of the field of view can also change.
Thank you and I look forward to hearing from you.
Frank Penny Nom lui répond. 





An irregular octagon 
20100309 

Gayle pose la question : Question from Gayle:
I am building an irregular shaped octagon wooden box.
The measurements are 291/2 inches by 211/2 inches.
Sides are 12 inches.
It will be 36 inches high.
What would the cutting angles degrees be? Harley Weston lui répond. 





A square corner 
20100211 

Trevor pose la question : I am building a new house and wish to set it out on site with the use of
profile boards and string. I want to be certain it is correct in terms of
squareness. I have a vague idea that the square on the hypotenuse should
be equal to the sum of the squares of the other two sides.
I get a little lost here and need some help. The building is a rectangle
measuring 40x30 feet to exterior brickwork. I guess that the length
of the hypotenuse should be exactly the square root of the combined
squares of the two sides.
Using the above measurements could you give me calculations from nuts
to soup as to the correct length of the diagonal. And what adjustments
are needed if everthing is not in accord.
Trevor. Robert Dawson lui répond. 





A dirt berm 
20100205 

casey pose la question : My question is two fold. I want to build a dirt berm that is 95 feet long and 8 feet high which has a 45 degree angle on each side of the slope. My first question is how wide will the berm end up being? Second question is how many cubic yards of dirt will I need to get? Thanks! Harley Weston lui répond. 





I want to convert my glaze percents into grams 
20100205 

linda pose la question : I am a potter. I want to convert my glaze percents into grams.
ex. 20% of 20 lbs would equal how many grams?
is there a formula to figure this? Penny Nom lui répond. 





The height of a roof 
20100131 

carl pose la question : Width of my roof I am building is 5M at baseline, and the pitch is 40%.
What will the height be, and how can I work this out in the future. Penny Nom lui répond. 





Loading a headboard in a uhaul 
20100120 

gina pose la question : I have a uhaul 9'10" long 4"9"wide 4'7"height I have a headboard 74 inches in height would it fit the box diagonally Penny Nom lui répond. 





A truncated cone 
20091111 

Lucian pose la question : I need to calculate the bottom inside diameter of a truncated cone.
The top insdie diameter is 1450mm.
The material is 6mm thick
The cone angle is 20 degrees
The slant length is 152mm
I would like a formula so that I can build a spread sheet Penny Nom lui répond. 





Cutting a pipe at an arbitrary angle 
20091024 

Carol pose la question : I have read your article on cutting pipe,etc. at a 45 degree angle. I need to develop
an equation and pattern for cutting any size pipe (3" to 7") to any degree. I don't
understand how to transfer the wave pattern to graph paper.
Thanks. Harley Weston lui répond. 





What jobs use conics? 
20091022 

denise pose la question : i have to type a paper on what jobs use conics and i can not find anything can you help
thanks
Denise Penny Nom lui répond. 





Hexadecagon 
20090920 

Rick pose la question : Is there an easy way to figure the even side lengths of a Hexadecagon in layman's
terms, so I know how long to cut the exterior support boards for my pool deck.
The pool is a 16' diameter Hexadecagon and my Wife wants a 4' wide splash deck
all the way around which would make the outside 24' in diameter. Chris Fisher and Harley Weston lui répond. 





Segments of a ring gasket 
20090920 

Robert pose la question : I am in the process of making an Excel spreadsheet in which our sales
team just needs to enter the outside diameter, inside diameter, and
number of segments to price ring gaskets that are too big to fit on a
sheet of material and need to be cut into segments. With your help I
was able to create a spread sheet that can calculate the Chord lengths,
and Segment height on a single gasket segment. I am now stuck trying to
come up with a formula to figure out the height of the second segment
when it is stacked on the first segment, then use it to add more
depending on the quantity of segments needed. I have an illustration
below showing 2 segments (of a gasket that was segmented into 4 pieces)
stacked together. I need to find a formula to get the dimension from
"A" to "B". Harley Weston lui répond. 





Dart teams 
20090918 

Sally pose la question : I have 14 dart teams. Each team has a home bar.Usually it is one week home, the next week away. I have 3 locations that have one board only, yet have 2 teams at each location. I have one location that has 2 dart boards, and 3 teams. The last location have 3 dart boards and 4 teams.Can you make me a schedule that will be home and away, and every teams plays each other twice. In case you are wondering, the bars sponsor the teams.Thank you. Sally Robert Dawson lui répond. 





How deep is the hole? 
20090825 

Scott pose la question : If I have a hole three foot in circumference that runs at a 15degree angle from the surface and continues for a length of 100 feet, how deep would the hole be at 100 feet? Penny Nom lui répond. 





A paper towel roll 
20090819 

Jeff pose la question : I am making a spiral tube with paper that is 2" in dia. and 102" long
I will be using paper that is slit 3" wide how many lineal feet of paper will
I need to to cover the 102"
I will be using 3 rolls of paper that will over lap the other by half to make
a hard tube (paper core) in a roll of paper towels
Thanks Jeff Penny Nom lui répond. 





Math in everyday life 
20090803 

Naveen pose la question : Dear sir,
We are advised to do a project on "Mathematical modeling to solve various problems
of our everyday life/environmental related problems...... Can u plz help us by mailng some
ideas, suggestion,reference to make my project successful.... Thanking you......
Waiting for your favourable reply...... Penny Nom lui répond. 





The retail price for an ice cream scoop 
20090705 

Patricia pose la question : Hi  I am trying to figure out the fairest retail price for an ice cream scoop. We have an ice cream parlor
and the cost of the ice cream we buy by the bulk container has recently been increased so now we must charge
more for our scoops. We pay a wholesale price of $25.40 for 242 ounces of ice cream. The cost per ounce is
$0.105. What is the formula for figuring out how much to charge retail per scoop? This is probably so simple
but confusing to me. Please help. Thank you! Harley Weston lui répond. 





A roll of paper 
20090705 

mark pose la question : is there a simple way of finding out how much is left on a roll of paper. i have read similiar questions and answers on here but all seem very complicated and not being very good at maths does not help me much. some are in inches and all have different figures to mine so if i give my figures hopefully i wil understand it better. the radius of the cardboard core is 52.25mm, the radius of the paper at 2000 linear meters is 158.625mm. the thickness is 0.17mm. when nearing the end of the paper how do i work out how much is left in a simple way. thank you in advance for any help you can give me Harley Weston lui répond. 





liquid in a 3/4 inch pipe 
20090630 

junior pose la question : We are in dilemma at my job. We need to figure out the formula for how much water can our pipe hold. It's inside diameter is 13/16" and is 50ft. long? Robert Dawson lui répond. 





The surface area of a fire pit 
20090630 

eric pose la question : whatw is the square footage of the inside wall of a fire pit 2 feet deep and five feet in diameter? I need to estimate both the floor and wall square footage to order bricks. Robert Dawson and Harley Weston lui répond. 





Integers and decimals in day to day life 
20090629 

mitichie pose la question : can you tell use of integers and decimals in our day to day life. Penny Nom lui répond. 





Designing a shelf 
20090628 

Bjorn pose la question : I'm putting up a shelf and thought I'd be nice and cut the sharp and pointy
corners off. I want to the cut to be at a 45 degree angle, but I also want
the exposed edge to be the same length as from the wall to the beginning of
the cut  so the end of shelf will look like the first two sides of an octagon.
I've managed to construct the solution, but I haven't been able to calculate it...
Please help! Stephen La Rocque lui répond. 





An octagonal shaped gravel pit 
20090416 

Melissa pose la question : What is the square footage of a 7'3" square ocatogon with a height of 5 inches? I need to know how much pea gravel to buy for my sons gravel pit. Stephen La Rocque lui répond. 





Winding paper after a break 
20090410 

Olen pose la question : Question from Olen:
I work in a paper mill and have been handed the task to search for a formula to determine how much paper needs to be added to a parent roll to make up the difference at the winder. (Ex. The spool diameter at the reel is 18.25" we measure roughly 33.5" to make two 58" rolls in the winder. If the is a paper break and the roll diameter in the winder is 30" how much do I add to a single parent roll (22" roughly) to make one 58 " and the 28" needed at the winder. I would appreciate any help to complete this task. I would like to be able to build a chart that operators can refer to based on what is needed. Thank you. Harley Weston lui répond. 





An arched or round top window 
20090407 

Dale pose la question : I need a formula to figure the lineal footage of trim require to trim an arched or round top window. The variables that I have consist of the width of the window the height of the arc and the radius. Harley Weston lui répond. 





Why learn math? 
20090401 

Uno pose la question : I got myself in a lot of trouble today. I got into an argument in school with my math teacher because while learning geometry I said that this was useless.
I don't understand why I need to learn algebra, geometry & trigonometry.
I don't see how we use this in real life and it is almost like my teachers don't know either. They say I have to learn it because... I don't think that is a good enough answer.
The only way I don't get suspended is if I can come up with real world applications of why we learn math.
I need help... I am already in deep trouble with my parents. Any resources on how learning a proof is used in real life? Claude Tardif and Harley Weston lui répond. 





Subdividing a foursided lot 
20090327 

kannan pose la question : i have a 1.5 acre land having four sides
AB=64.8 meters
BC=94.2 meters
CD=54.4 meters
DA=127.2 meters
angle at D is 90
the side AB (frontage)is road facing i want to split the plot in to two halves
having same almost area and almost equal frontage, kindly help me, if possible
explain with drawing.
Regards
Kannan Harley Weston lui répond. 





Octagonal panels for a horse pen 
20090325 

Tony pose la question : I am building a pen for my horse. I am going to use 12' panels in the shape of an octagon. How many feet will he have from side to side using 12' panels.
Thanks,
Tony Robert Dawson and Penny Nom lui répond. 





The diameter of a roll of plastic 
20090324 

truong pose la question : hi. i have trouble to calculate the diameter of the plastic roll. the sheet is 765 m long and 0.8 mm to wrap around the core 400 mm in dia. please help me with the formula to calculate the dia of plastic roll, thanks in advance Harley Weston lui répond. 





16 golfers 
20090318 

Bill pose la question : We have 16 golfers. We golf for 5 days, in foursomes. It should work out that each player plays with each other player 1 time exactly.
I just can't figure it out.
Thank you in advance!
Bill Claude Tardif and Victoria West lui répond. 





The amount of material remaining on a reel 
20090304 

James pose la question : Question from james:
I am after a standard calculation so that after each usage of the Reel I can get the Remaining Quantity in kilos left on the roll
below is an example of roll
THICKNESS: 30 MICRON
REEL WIDTH: 7.5 CM
REEL DIAMETER: 76 CM
REEL WEIGHT: 7.13 KILOS
The core centre has a 9cm diameter, the weight of the roll is excluding the core , and after each use the diameter of the role is measured.
I am a factory supervisor working on project and need this calculation info for template.. Thanks James Harley Weston lui répond. 





The area of a 5sided lot 
20090302 

Linda pose la question : I have a problem I'm hoping you can provide some help with. When I check the property information for our home on our District of North Vancouver website, it shows that our property is supposed to be 1146.99 Square Metres. Yet another property which has identical measurements is listed as having 1173.7 Square Metres. I would like to figure out who is correct. Harley Weston lui répond. 





An octagonal landscaping frame 
20090301 

Richard pose la question : Hi
I am trying to put landscape timbers down in octagon shape that measures 6
feet across and outside measures 360 degrees.. The timbers are 4 inches by 4
inches. I need to know at what angle to cut boards and at what length i need to
complete octagon.
Thanking you in advance for your kind assistance.
Richard :) Harley Weston lui répond. 





More on the gst 
20090223 

melissa pose la question : I need to know the amount of gst that was in the amount of 630.67? How do you figure this out? I don't need the amount of gst after, but the gst included? Penny Nom lui répond. 





An octagonal poker table 
20090223 

Corey pose la question : I'd like to build an octagonal poker table using 4'x8' sheets of plywood. I would like each side edge to be approx. 2' wide. I am sure that due to the angles I can do this with one sheet of plywood, but i don't know how to measure for this. Can you help? Robert Dawson and Harley Weston lui répond. 





A conical sleeve 
20090217 

Jonathan pose la question : I'm having a hard time making a design pattern for a cone sleeve, the thing is the cone sleeve is 22 degrees, how can i know the angle of this when it is flat on paper, based on my calculations, it should be around 66  69, but i want it to be exact can anybody help? Penny Nom lui répond. 





The floor area in a spherical space station 
20090214 

Ed pose la question : I am writing a science fiction novel that involves a spherical space station with a
radius of 800 meters. Inside, artificial gravity allows parallel floors set 4 meters
apart. If you count the floor that has a radius of 800 meters as Floor 0, then the
next floor up (Floor +1) would by 4 meters above the surface of Floor 0. There
would then be Floor 1 4 meters down from Floor 0. This would continue until
you reach the top or bottom floor, where there is at least 4 meters but less than
8 meters to the top or bottom of the sphere. Obviously the top and bottom
floors would have the (same) smallest area, while Floor 0 would have about 2
million square feet.
My problem is figuring out the total area of all of the floors, or for that
matter, any particular floors or the total number of floors (the total of all the
+ floors, the  floors (these numbers will be the same) plus Floor 0.
Ed Penny Nom lui répond. 





9 golfers 
20090212 

Beth pose la question : I am organizing a golf trip for 9 women. We are playing in threesomes
and are playing four days.
I would love to mix it up so that everyone gets to play with each other
at least once. Any mathematical suggestions as to how I can make this
happen?? Robert Dawson lui répond. 





Forming an arc with 2 inch steel 
20090211 

Craige pose la question : I need to calculate the bending radius of 2" wide steel to achieve given inside and outside arc lengths Harley Weston lui répond. 





Fertilizer in a bin 
20090203 

Todd pose la question : Hello I am looking for a formula to figure out the fertilizer volume in a hopper bottom bin not only when it is full but part full as well. When you are filling it is heaped up in the middle to make a cone and when you are emptying the bin the cone is inverted so it would be nice to be able to quickly figure out the tonnes partly filled and when full.
Lets say the bin is 32 feet high from top of bin where you fill to the bottom where the product goes out and it is 16 feet in diameter. I know how to calculate the cylinder it is the cones on the top and bottom of the bin I have the main question on. Harley Weston lui répond. 





Calculating markup 
20090203 

Tonya pose la question : I'm trying to figure out the formula for the following, I have a product that I want to receive a certain profit, but with this product I also have to pay a percentage of commission to someone. I need to know how to calculate my new selling price taking into account the markup percentage, but I don't want my cut to be lowered. I have calculated the markup percentage to get my new selling price with the commission, but it lowers my cut once I pay the commission and I don't want it to do that. Thanks Penny Nom lui répond. 





Ambitious 7th Grader 
20090128 

John pose la question : I have been asked to tutor a 7th grader who is very good in math. He is taking the most advanced course that his school offers to 7th graders. This course will cover Algebra 1 over a period of two years, using McDougal Littell's Algebra, Structure and Method, Book 1, a book I like a lot.
I have been hired not to help him with his schoolwork, which is too easy for him, but to guide him through something in math beyond his schoolwork. This was his idea, an idea which surprised his parents, but one which they support.
Do you have a suggestion for me? If so, I would be very grateful to hear from you. I think this could be a lot of fun for me and my new student, if I pick the right path.
Thanks and best regards,
John
John Robert Dawson, Victoria West and Walter Whiteley lui répond. 





25,000 pounds of sheet metal 
20090127 

JESSICA pose la question : I need to convert 25,000 lbs. of 32x48 sheet metal into total sq. feet. What would be my formula? Robert Dawson lui répond. 





An octagonal carpet 
20090124 

Larry pose la question : I am cutting a piece of carpet that is 9 feet x 9 feet and need to cut it into an octagon. How far do I cut from the corner of the square. thank you for any help. Harley Weston lui répond. 





PST and GST 
20090120 

janet pose la question : Hello
I need to figure what one would pay pst 8% gst 5% on a total of $1700.00
I have a small business some pay with cash I need to calculate the taxes in reverse Can you help with formula that the government might like
Thank you
Janet Harley Weston lui répond. 





Multiplying negative numbers 
20090115 

stephanie pose la question : hi, I'm currently working in a grade 8 class where the students are
learning about integers. the students were asked to find examples of how
integers are applied in real life. they were able to find aplications for:
adding and subtracting both positive and negative integers. however,
we could not find an example of where two negative integers would be
either divided or multiplied together in real life. For example: (2)(4)= +8.
please help. Harley Weston lui répond. 





Concrete around a pipe 
20090114 

Doug pose la question : How much concrete will i need for a hole that is 20 feet deep 20 inches in
diameter with a 8inch pipe in it. I need to know how much concrete
on the outside of the 8inch pipe. Penny Nom lui répond. 





A applied math trig problem 
20090113 

Simon pose la question : I wish to find all the answers for the following equation over the interval (0,1):
cos^2(pi * n^x) + cos^2(pi * n^(1x))  2 = 0
where n is any integer > 0 Robert Dawson and Harley Weston lui répond. 





18 golfers and 5 rounds 
20090110 

steve pose la question : We have 18 golfers 5 rounds .
Would like 3 foursomes and 2threesomes each day
Different groups each day. Victoria West lui répond. 





Pouring angles for a crucible 
20081220 

Richard pose la question : I am trying to work at pouring angles and volume left in during pouring a crucible, The crucible is cylindrical and flat bottomed.
I know the diameter, radius and volume of the crucibles. and the volume of liquid going into it.
So lets say the crucible is only half full firstly I need to work out the angle just before its going to pour. ( I can work this out as long as there is a certain volume of liquid if its not enough I cant do it)
Now the problem I also need to work out how much I should tilt the crucible to allow a certain amount out and be able to do this untill the volume reaches 0 at 90' turn. This is where I am stuck.
The reason for needing to be able to work this out is so i can develop a constant flow for example 10Kg of metal per second.
Thank you very much for you time Harley Weston lui répond. 





The volume of a feed hopper 
20081218 

John pose la question : I need to calculate the volume of a feed hopper, and I'm not sure how to break it down. The top of the hopper is 36" x 36", it is 30" deep, and ends at a 6" x 6" plate. One side of the hopper is straight top to bottom, of course tapering on two sides to meet at the plate. The other three sides angle down at about 75 degrees. I need to determine the cubic foot volume of this hopper (it is used for ground coffee) so I can configure a vibrator to knock down residual grounds. Thanks. Robert Dawson lui répond. 





Wall covering 
20081210 

Jeanie pose la question : I need to convert 14 LY of wallcovering (54" wide) to square feet. Can you please help me? Penny Nom lui répond. 





The volume of a pipe 
20081210 

Walter pose la question : What is the volume of a pipe 7.92 inches inside diameter and 22 km. long in cubic feet of water Robert Dawson and Harley Weston lui répond. 





Square yards of dirt cover 
20081208 

Phillip pose la question : How many square yards will 600 cubic yards of dirt cover, at a depth of 4 inches? Harley Weston lui répond. 





Golf  24 guys 4somes 6 rounds 
20081207 

Duane pose la question : Thank you. What about 24 guys 4somes 6 rounds everyone playing with each
other at least once.
Thanks again.
Duane Victoria West lui répond. 





What is the pre GST price? 
20081205 

Chris pose la question : I've been looking at a few answers to the question of before and after GST price calculation.
the suggestion have been :: multiply the pre GST price by 1.10 to get the
price and reverse to get a pre GST price.
But how do you calculate the pre GST price from an existing retail price?
For example if you take an item that is $150.00 and multiply it by 0.10
you get $15.00 as the GST add on. Apparently giving you $135.00 as the
pre GST price. However if you then multiply $135.00 by 1.10 you get the
$148.50 as the total.
So the question is how does one calculate the real pre GST price from
an existing retail price?
Regards,
Chris Penny lui répond. 





Combinations of Golf Groups 
20081205 

Duane pose la question : We have a golf outing coming up with 25 golfers playing 5 rounds in 5somes. Is there a formula to figure out where everyone can play with different people each round? Thanks, Duane Victoria West lui répond. 





6 golfers play threeball 
20081204 

Ian pose la question : I have a group of 6 golfers wanting to play 3 rounds as 2x threeballs, but with different players each day. Is this possible? Can you provide some threeball combinations for this please? Victoria West lui répond. 





Decimals and fractions used in our daily lives 
20081204 

josh pose la question : i have a projecct due friday and i need to know, how are decimals and
fractions used in our daily lives. i am having trouble coming up with
ideas. i need seven more that dont involve money or recipes. please
help me. Harley Weston lui répond. 





What is so important about quadratics? 
20081129 

zoe pose la question : what is so important about quadratics? Harley Weston lui répond. 





Six golfers 
20081125 

Joe pose la question : I have a group of 6 golfers wanting to play 3 or 4 rounds but with different players each day if possible. We know we cannot make it happen without some playing with the same person. Can you provide some pairings for this? Victoria West lui répond. 





Quadratic equations arising from practical problems 
20081124 

Lenval pose la question : Why do quadratic equations arising from practical problems often give physically impossible solutions such as negative distances, negative times or, say, a polygon with a negative number of sides? For example: "A river in flood carries a tree tsquared  23t metres downstream in t seconds. How long does it take for the tree to be carried 50 metres downstream?" This gives t=25 and t=2. Please explain the second 'solution', which is not physically possible. Chris Fisher and Victoria West lui répond. 





Cubic yards of fill dirt 
20081122 

Donnie pose la question : I need to know the formula to figure cubic yds of fill dirt to fill an area from 4ft. deep to 18 inches deep
this lot is on a slope and I am wanting to level 176 ft long by 4ft. deep
the sides is 115 ft. wide
the upper side is 18 inches deep. Harley Weston lui répond. 





15 cubic yards of dirt 
20081120 

Phillip pose la question : How far, in feet, will 15 cubic yards of dirt cover, if I'm laying it 12 feet wide and 4 inches deep? Please provide formula. Penny Nom lui répond. 





An odd shaped lot 
20081113 

Janice pose la question : Hi I am attaching a survey of an odd shaped real estate lot. I am hoping
you can help me determine the acreage.
Janice Harley Weston lui répond. 





A barrel on its side 
20081113 

Dave pose la question : Question from Dave:
How many gallons are left in a 36x60 in. barrel (laying on its side) and has 16 in. of gasoline left. I have attached a diagram. Harley Weston lui répond. 





The cost of a steel plate 
20081105 

Tammie pose la question : What is the formula to calculate the following:
I have a plate of steel that is 1/4" x 48" x 192" at a price of $15.23 per square foot
What is the formula to calculate the cost if I only use 1/4" x 471/4" x 681/8" of that steel plate? Penny Nom lui répond. 





The volume of a pond 
20081104 

Malcolm pose la question : I am looking for a formula to find the volume of my pond. I know the average surface diameter and the average bottom arc length.(The arc from one bank through a point in the bottom and on to the surface on the other bank. I am not able to get a good measurement of the depth at this time. Can the volume be figured with the known measurements (the cord and the arc)? Thanks: MS Harley Weston lui répond. 





A bay window 
20081030 

Scott pose la question : Given the length of an arc, the rise of an arc, and the number of segments
that I need to divide the arc into  how do I determine the length of each
segment? Imagine a bay window. It could have 5 side or 7 sides, just as
an example. How do I determine the width of each window given that the
unit will be mounted into a frame with a 96 inch opening. The rise of the
unit will extend out 18 inches. Lets say that the number of single windows
unit within the unit is 5. How wide should each window be? Do you
understand? Harley Weston lui répond. 





Scaling a logo 
20081020 

Carl pose la question : Hello!
I hope that you can help me out here. I've been trying to figure this out for awhile now and can't come up with the answer logically.
I am a graphic designer by trade and need to figure out how large my client's logo should be.
The logo will need to be sized proportionally with the surface area of the page.
The logo will always be sized at 1.2938(w) x .75(h) on a letter size page (8.5 x 11).
My question is...
When you increase the size of the page (not always proportionally sized  dimensionally) how do figure out the NEW size of the logo.
I could have a page 20" x 40" or 30' x 4'... or ANY size really.
I believe I have the new surface area of the logo but can't find the new dimensions. Harley Weston lui répond. 





The area of a rug 
20081016 

Natcha pose la question : How can I convert the Carpet Roll Size to Square Meters.
I have one Roll of carpet, (Quality is 2300 g/m2; 7 pitch/in, 9 rows/in; width: 2m) with dimension 0.5 m width and 4 m length. I needed to know that quantity of that Roll in Square Meters. Penny Nom lui répond. 





A roll of film 
20081016 

John pose la question : I need to know how to calculate the build up on a roll of film is calculated.
Example: I start with a 6" diameter core, and I start winding .005" thick film on the core, so I am adding a total of .010" to the diameter each wrap.
If I continue to do this for a total length of film of 3000 feet, what will the roll diameter be?
So what I need is the formula to perform this type of calculation.
Can you help me? I want to be able to plug the formula in a spread sheet and to be able to input a core diameter, a film thickness and a total length and get a roll diameter. Penny Nom lui répond. 





Concrete around a pipe 
20081008 

mick pose la question : i am trying to find the area of concrete to be placed around a concrete pipe! Dimensions can be 12m wide by 5m wide by 7m deep and pipe been 8m by 600mm radius... Stephen La Rocque lui répond. 





The dimensions of a pool 
20081008 

Justine pose la question : This may be a really silly question but I am trying to work out what the possible dimension a pool may be if we have 20m length of wall of an above ground pool (laid out flat on ground)
We have been given a second hand above ground pool and we know it was in an oval configuration and we are just trying to get a guesstimate of the potential size it may be as the people couldn't tell us the size Penny Nom lui répond. 





An arc and an angle 
20081005 

Cory pose la question : I have a chord length of 150'. From the left starting point, I know that
30' right of starting point is 9' in height. This would be the top of the arc.
What is the arc in degrees and can anyone display an image to help me
understand? Penny Nom lui répond. 





The area of an arched transom 
20080928 

Ivan pose la question : What is the formula for figuring out the square footage of arched transom windows & doors? Harley Weston lui répond. 





Increase pricing by 5% 
20080928 

Adrian pose la question : I am working to increase pricing by 5%. If the price is 100, I would typically use the formulas 100 * 1.05 = 105, which is a $5 increase. An associate suggests I divide to get the desired increase. For example, using $100 with a 5 percent increase. I would use the forumula 100/.95 = 105.26. Thas is a 5.26 increase. Can you explain this method to me an why the different increases? Which one is correct. Penny Nom lui répond. 





A three 09 tumbler lock 
20080922 

Louis pose la question : I recently gave my daughter an old briefcase which uses a three 09 tumbler lock. She set the lock and now she can’t open one side.
Q. Is there a 3 digit combination number generator available to give me the 1000 possibilities?
Thanks,
Lou
PS In this type of lock you can repeat the same digit three times. Penny Nom lui répond. 





Cutting a pipe at an arbitrary angle 
20080920 

John pose la question : from the original question Al asked about cutting a 200 diameter pipe in 45 degrees. can someone explain the math steps required to creating the graph. I am trying to do the same thing only using a 150 degree cut. Harley Weston lui répond. 





The weight of a concrete cylinder 
20080918 

Curtis pose la question : I am trying to calculate the weight of a concrete cylinder. The diameter is 56" and the thickness or depth is 24". Can anyone help me? If possible I would like to see the formula as to how the answer was derived. Thank you Harley Weston lui répond. 





Art and Integers 
20080917 

pamela pose la question : how do artists use integers? Janice Cotcher lui répond. 





Cubic yards and quarts 
20080916 

Mary pose la question : I need 2 yards of soil, how many quarts is this? Penny Nom lui répond. 





Cutting a pipe on a 45 degree angle 
20080912 

Bakshani pose la question : how do you a mark a pipe 5 inch diameter and cut it to form a 45 degree angel Stephen La Rocque lui répond. 





Mixing watercolour paints 
20080907 

bob pose la question : So, I'm making a chart to help me mix watercolor paints. There are
25 different paints. Each paint will mix with another paint just 1 time.
There is no need to mix red with blue, and then blue with red. Since
the result is the same, we only need 1 combination of the 2 paints.
And there is no need to mix red with red, so we can eliminate 25
combinations of the same paint. Penny Nom lui répond. 





20 golfers playing 5 rounds in 4somes 
20080903 

joe pose la question : 20 golfers playing 5 rounds in 4somes. 5 players in group A play with all 15 golfers in groups B,C,D but not with any in their own group (A).
5 players in group B play with all 15 players in groups A,C,D but not with any in their own group (B) and so on. So each 4some has an A,B,C,&D player each of the 5 rounds. Chris Fisher lui répond. 





GST and PST 
20080825 

Monique pose la question : okay i live in ontario and i want to find out what my grand total will be so
i know how much i will have to pay...
so if i have a before tax total of $48.40... what will my grand total be? with
GST and PST i know that GST=5% and PST=8% Penny Nom lui répond. 





The volume of a ditch 
20080812 

John pose la question : Question from John:
I am trying to figure out how much flowfill I will need for a ditch that we are digging out. The ditch is 300' long and is 4' deep on one end and 2' deep on the other end. We are going to dig this ditch out and replace it with a flowfill concrete material. How much flowfill material will we need or what is going to be the volume of this ditch? Penny Nom lui répond. 





Square miles 
20080806 

Koni pose la question : I'm trying to figure out the distance our buses travel throughout our district to pick up students for school. How do you figure square miles?
If our district measures 6 1/2 miles wide and 2 3/4 miles deep, what is our total square miles? Penny Nom lui répond. 





The volume of a fuel tank 
20080801 

G. pose la question : I have a fuel tank that is 70 inches by 48 inches and 24 inches deep, how many imperial gallons does it hold? Victoria West lui répond. 





Lot size of a four sided lot 
20080730 

JAMES pose la question : I'm trying to find out this lot
size in acres.
I looked at a bunch of your suggestions, but I guess
I'm not smart enough
to figure it out.. I have attached an image of the
lot, hopefully with
enough info. for you..
Thanks,
Jim Penny Nom lui répond. 





Volume of a Shed 
20080724 

lou pose la question : I need to know the interior volume in cubic feet of a shed with the dimensions 8' x 10' x 7' with a roof peak of 9'. Thanks Janice Cotcher lui répond. 





How many gallons of fuel still in the barrel? 
20080722 

Charles pose la question : I have barrel 6 feet long and 3 feet diameter that is laying on it's side with 5 inches of fuel, how many gallons of fuel still in barrel Penny Nom lui répond. 





How much sand do I order? 
20080715 

jackson pose la question : We would like to put 2 inches of sand down. The pool is 24 feet.
How much sand will we need?
The person we spoke to yesterday was talking in tons, but on these sites it is
talking cubic yards or feet.
Please help. We would like to get the sand ordered so we can get the pool up! Harley Weston lui répond. 





Chords and arcs 
20080711 

Ronnie pose la question : We are trying to build a semi life size ark decoration , and we are trying to cut the sides out . The curved sides and we can't figure our radius , all we know is that our chord length is 24ft. any suggestions on how to find the radius or maybe even the arc length or circumference or diameter? Harley Weston lui répond. 





A four sided lot 
20080709 

michelle pose la question : the front is 65.29
left side 162.26
the back 155.00
right side 101.01
right angle=50.00
left angle= 153.30 Harley Weston lui répond. 





GST and PST 
20080702 

Sharon pose la question : The question was asked before but it was based on a G.S.T of 7% and I am now interested in the answer for 5% G.S.T.
It usually comes up when I husband bring homes a gas bill that doesn't break down the gst and pst, but rather just gives him the total cost I have to know how much GST he paid. If it is Diesel the PST isn't included but if it is regular gas he pays both. PST is 7%. Penny Nom lui répond. 





A six sided lot 
20080625 

Zack pose la question : Please help me find the area of my lot. I am sending a fax of the drawing and dimensions.
Zack Harley Weston lui répond. 





A golf tournament 
20080624 

Roland pose la question : We have a golf tournament, 12 players, three rounds. We want to pair so that we have pairings with as few duplications as possible. Janice Cotcher lui répond. 





Concrete blocks 
20080618 

marvin pose la question : How many cement blocks do i need to build a 8 ft. tall wall x 1,300 ft. long? Harley Weston lui répond. 





Percent difference? 
20080614 

Cathy pose la question : I am trying to verify a "percent of difference" as stated on a tax form. I cannot seem to come up with the equation to do so.
Here are a few examples on the form:
Last year $62.91 this year $66.05 tax difference $3.14 percent difference 5.64%
Last year $ 2014.97 this year $1982.93 tax difference $32.04 percent difference 57.56%
Last year $97.66 this year $79.58 tax difference $18.08 percent difference 32.48%
I have tried several different ways and per some of Q&A's already on your site I still have a problem and would appreciate some assistance.
ThanksCathy Penny Nom lui répond. 





Escort cards on a rectangular table 
20080613 

Susan pose la question : What size rectangular table will we need to put 230 2" X 3.5" escort cards on for my daughter's wedding reception with a spacing of .5 inch between them on all sides? Thanks so much for your help Penny Nom lui répond. 





Rectangular cards on a round table 
20080611 

Susan pose la question : How many 4" X 3.5" wide escort cards will fit on a 48" diameter table. These are for my daughters wedding. I have already added the extra spacing between the cards into the size of the cards.Thanks for your help Janice Cotcher and Harley Weston lui répond. 





What is the GST component? 
20080611 

Jilly pose la question : I need to find a quick and easy formula for finding the gst (10%) of the total amount in $ terms, eg: the total is $500 what is the gst component? Penny Nom lui répond. 





Packing a truck 
20080610 

Ann pose la question : I am renting a 24ft box truck and have been told it is 1401 cubic feet. I want to know if I have 23 display cases to move and each is 6ft X 2ft X 3ft will the all fit? Or do I need additional info in order to figure this out? Penny Nom lui répond. 





Filling a hole with sand 
20080605 

greg pose la question : I have a 18 ft. diameter circle and need to put 2 in. of sand in it i need to know how much sand in cubic yards and tons Harley Weston lui répond. 





I want to fill my backyard slope with fill dirt. 
20080525 

Piero pose la question : I want to fill my backyard slope with fill dirt. The slope is 50 feet wide and the distance from the top of the top of the slope to the bottom is about 15 feet deep and the slope angle is at a 45. I want to know how many yards of dirt do I need to fill a space that is 20 feet out, 15 feet deep at a 45 degree angle. Stephen La Rocque lui répond. 





Ten acres 
20080525 

RICHARD pose la question : hi, i am getting 10 acres of ground from a aunt which is going to be taken out of a 50 acre tract.both the north and south lines are 1320 feet long.i need to know how long the east and west lines will be to make the 10 acres and what the square footage will be for the 10 acres Harley Weston lui répond. 





Applications of trigonometry 
20080524 

Mohita pose la question : I have got a project in the school and i am not getting anything about the topic. The topic is that we need to find the application of trigonometry on any one of the real life situations using 3dimensional figures. I mean how can trigonometry can be used in real life situations like navigation, architecture, survey, astronomy etc. Penny Nom lui répond. 





A 9 team flag football tournament 
20080522 

James pose la question : I like to run a 9 team flag football tournament where each team is guaranteed 3 games prior to playoffs. All games must have playoff implications and must not be a consolation game. Victoria West lui répond. 





A season schedule for 9 teams 
20080522 

James pose la question : would like to put together a season schedule for 9 teams with each team playing three or 4 games leading to a 1 to 9 ranking. Victoria West lui répond. 





Volume/weight of a salt shedweight 
20080521 

James pose la question : How do I find the volume/weight of a salt shed. I have a 3000 ton barn, I need a better way of finding how much salt to order as it gets used. I know how to calculate volume, how do i get tonnage from there?? Harley Weston lui répond. 





Covering the bottom of a pool 
20080521 

Chris pose la question : I need to know how many sheets of 4 foot by 8 foot by 1 inch foam
I will need to cover the bottom of a 27 foot diameter pool? Thanks! JaniceCotcher lui répond. 





A weird shaped lot 
20080521 

James pose la question : Need to find square foot of a residential lot on a culdesac. Weird triangular shape. Measurements : 126.18 170.08 138.2 48.4 Harley Weston lui répond. 





The length of an arc 
20080516 

Don pose la question : I am trying to determine the length of an arch with a two foot backset from 32 foot frontage. Harley Weston lui répond. 





Tyres in a shipping container 
20080514 

Carlene pose la question : I need to work out how many tyres will go in a shipping container.
The shipping container is 10 foot long, 8 foot wide and 8.6 foot high.
The tyre is 175 millimeters across and it is 14 inches in tyre thickness.
How many tyres will fit in my container? Stephen La Rocque lui répond. 





The volume of a ditch 
20080509 

Dixie pose la question : I need to find the cubic feet of a ditch 36 inches wide by 28 inches high, by 1561 feet long.
then I need to convert it to cubic yards then to tons. of rock Penny Nom lui répond. 





An octagonal prism 
20080427 

Melanie pose la question : My son is identifying geometric shapes in the real world? We are stuck on octagonal prism, rectangular prism and square prism. Can you help me out with some examples. Thanks Penny Nom lui répond. 





The volume of a triangular shaped pond 
20080410 

Bret pose la question : we have a pond that is triangular shape : 130ftx130ftx150ft and is 4ft deep. How can I figure out as to how many gallons of water it will take to fill it up? Thanks for your help :) Penny Nom lui répond. 





Cutting a 200 diameter pipe at 45 degree angle 
20080410 

Al pose la question : i want to cut a 200 diameter pipe in 45degrees. Can you demonstrate how to develop a flat rap around please Harley Weston lui répond. 





How many bags of mulch? 
20080407 

MJ pose la question : I have an area that is 35' X 50' and I want to cover it with 2" of mulch.
Do I take length X Width X depth? Bags of mulch are sold in 2 or 3 cubic feet per bag.....I just want to know how
to do the math. can you please send me the equation? Penny Nom lui répond. 





A 100 acre square pasture 
20080403 

Richard pose la question : I need to know how many lineal feet there is around a 100 acre pasture that is square in shape. I am no longer able to get out and measure it myself, and cannot remember the math to compute it. Penny Nom lui répond. 





How long will it take to pump the water out of the basement? 
20080401 

Shiva pose la question : I need to pump water out of a flooded basement, using two 50 (gpm) pumps. The basement has the dimensions shown and is flooded to a depth of 16 inches. How long will it take to pump the water out of the basement? Harley Weston lui répond. 





Packing a trailer 
20080401 

Shellie pose la question : I have a trailer that is 8 ft x 5 ft. I have a hutch base that is 32 in
x 52 in,
hutch top is 47 in x 52 in, table 56 in x 44 in, 6 chairs that are 48 in
x 20 in.
I know that the cubic feet of the trailer is l x w x h=3D 5 x 8 x 5=3D 200
cubic feet
I know that the area of the items are approximately 1026 feet.
How do I
know
if these things will fit? I would like to know the math behind it? Penny Nom lui répond. 





I have to fill a hole with clay 
20080331 

Tim pose la question : Dear Sirs I have to fill a hole with clay and then 8 inches of top soil. The area is a 24 foot circular hole left by a now removed swimming pool. The area in question pithces from the house from 48" to ground level within that 24 feet. I was wondering how many yards o the top soil has to be 58 inches deep thank you f fill(clay) I would need and how many Yards of top soil to cover that hole Harley Weston lui répond. 





How many bags of cement do I need 
20080330 

Joe pose la question : How many bags of cement do I need if I want to extend my carport 6 inches all around?
The carport is 15ft. x 15ft. and the existing slab is 4 inches thick. Harley Weston lui répond. 





A fish tank in the shape of an irregular pentagon 
20080329 

richie pose la question : i am building a fish tank. it is going to be an irregular pentagon. the sides are going to be
24"
24"
8"
8"
32"(approximately)
there will 3 right angles A, B, E
my question is how to figure out the degree of the angles that are not right angles (C,D)? Chris Fisher lui répond. 





A car tire full of concrete 
20080327 

robert pose la question : I want to build a volleyball net support. I am using a car tire 24"odx16"id filled with concrete. how much will this weigh? thanks Penny Nom lui répond. 





The length of the ramp on a motorcycle trailer 
20080325 

Joshua pose la question : I am currently building a motorcycle trailer. I am trying to figure out the length of the ramp so that the bikes don't scrap the trailer/ramp as they are loaded. This is the info I have: the motorcycle is 6" off the ground in the center, the point where the tires touch the ground are 80" apart, the trailer deck is 20" high. How do I figure the length of the ramp? Please show equation so I have for future reference with different measurements. Stephen La Rocque and Harley Weston lui répond. 





A hydraulic cylinder 
20080324 

james pose la question : I am trying to adjust the placement of a hydraulic cylinder that raises a dump bed up from the frame of a truck.
How long would the cylinder (height of a triangle) have to be to raise the bed to a 70 degree angle?
The base from pivot to cylinder is 132.5 inches. Stephen La Rocque lui répond. 





Twenty golfers 
20080316 

john pose la question : I have a group of 20 golfers. We plan on playing 6 rounds of golf in 4 days. I would like to have the most possible combinations of players without each player playing with anyone if possible, in the 4 days of golf Victoria West lui répond. 





Mathematics in cooking 
20080315 

Emily pose la question : What forms of Mathematics are used in Cooking? Harley Weston lui répond. 





I need to level a 18ft x 21ft area that is very uneven. 
20080304 

Shelia pose la question : I need to level a 18ft x 21ft area that is very uneven. I have used a line level to determine the number of inches at various places in the area. This varies from 1 inch to 15 inches in order to bring the garden area up level. How do I calculate cubic yards so I can order topsoil for the area. If needed, I have the number of inches needed for each square yard area. Penny Nom lui répond. 





Pea gravel 
20080224 

Linda pose la question : I have a space of 16 feet by 8 feet. I want to fill it with pea gravel 6 inches deep. If the bags of pea gravel are
.53 cubic foot. How many bags would I need. Thanks so much. Stephen La Rocque lui répond. 





A real life example of a decagon 
20080212 

Htet pose la question : I have a math dictionary to complete by February 13, 2008, Wednesday, and I need to know what a real life example of a decagon can be. I need help on this! Penny Nom lui répond. 





Total profit 
20080203 

Rhonda pose la question : I help to manage a concession stand. We sell a variety of items. Some have a profit of 60%, some 80%, etc. We have done nothing scientific to choose our prices. We just try to stay in the ballpark of schools around us. Our administrator wants to pay those that run the concession stand a percent of what is in the cash box after startup money is taken out. We have some gathered some data (not much) on how many of each item we sell and can certainly calculate percent profit. Is the profit for the entire concession stand a weighed average? I'm thinking (% profit on candy)(number candy sold) + (percent profit nachos)(number nachos sold) + (percent profit pop)(number pop sold), etc. Will this work? Does the AMOUNT of profit for these different items need to be figuredin? Hmmm. . . Victoria West and Harley Weston lui répond. 





The size of a lot 
20080202 

linda pose la question : Hi, could you please tell me how close to an acre of land my lot is. The lot size is 140 ft by 200ft. I am trying to see how close to an acre it is. Penny Nom lui répond. 





Tiles on a basement floor 
20080131 

ORIETTA pose la question : I have a basement 1000 sq ft I want to purchase tile that are 18x18inches
and they are charging 4.15 sq ft how much would it cost since I will need
less tiles to cover the area since it's not 12X12 Penny Nom lui répond. 





The acre measurement of a property 
20080130 

Kim pose la question : I would like to know the acre measurement of a property that is 673.68 feet by 820.76 feet. Penny Nom lui répond. 





Belledout pier 
20080128 

Gina pose la question : I need to know how to find the total yards needed to fill a concrete pier that is 54"/ 108" and 26' deep.
That is...54" @ the top of the pier belled to 108" @ the bottom...26' deep. Stephen La Rocque lui répond. 





Out of school applications of Pythagoras Theorem 
20080123 

Laura pose la question : Hi,
I am currently working on a math summative in which I have to choose a real life subject and relate it back to the material in my grade 12 math class. I find the history and discovery behind the Pythagorean Theorem and Identity very interesting, but I have yet to find a reallife application of the equations. Yes, I know they are used for finding distances, heights etc., but realistically, how many people actually use it in those situations? Very few. I was hoping for a new application. Is the pythagorean theorem (sin^2x + cos^2x = 1) even applicable? Thank you,
Laura Harley Weston lui répond. 





A 16 sided lot 
20080116 

R pose la question : I am having a land of 16 irregular sides i know all the length of the sides how to calculate the
area of the land Harley Weston lui répond. 





How many rolls of stock do I need to buy? 
20080116 

Dan pose la question : How many rolls of stock do I need to buy?
Given:
The rolls are 40" wide, 20" roll o.d., 4" core o.d., gauge is 0.008"
I need to cut these master rolls in 6" strips (4" of waste per master roll)
and I need 1,270,500 linear feet of this strip. Stephen La Rocque lui répond. 





How many bags of cement will I need? 
20080115 

James pose la question : I want to extend my front porshe more to the left atleast 14' 1" length wise and 5' 1" width wise with 4" thickness. Now i already decimalized in feet those inches, resulting with 14.08 length and 5.08width and 0.33 of thickness. I then Get my square feet of 71.53. And go on to cubic feet getting a 23.60 in cubic feet. Now i want to convert to cubic yards so i then divide 23.60 into 27 and get 0.87. Now my question is how would i use this to go and buy the necessary bags of cement knowing that a 94 lb. bag of cement is 1 cubic foot of bulk material. To fill 4 inch of thickness and 14' of length and 5 of width? Stephen La Rocque lui répond. 





Practical applications of sequences 
20080101 

carl pose la question : can you give me examples of different kinds of practical applications of sequences? Penny Nom lui répond. 





An irregular octagon 
20071223 

Sheldon pose la question : I am attempting to construct an irregular octagon picture frame out of bamboo. The bamboo is 1" in diameter and the opening should be 20" H X 16"W.
What measurements should be used? Penny Nom lui répond. 





Negative numbers 
20071214 

mannal pose la question : what negative integers do we use in the real world? like 30 temperature? Penny Nom lui répond. 





Bags of concrete 
20071206 

Chris pose la question : I need 1 and one half yards of concrete for a project. If one bag is equal
to 0.38 cubic feet, how many bags will I need? Penny Nom lui répond. 





The diameter of a gasket 
20071201 

Jorge pose la question : I have an application where I am using a circular silicone gasket. I have the total length but would like to calculate the diameter with the given length. What formula should be used? We receive these gaskets in a roll and cut them about 21 inches and glue the ends together to make it one piece. I would prefer to purchase these already cut and glued but require a diameter. If I had the overall diameter from a 21 inch length gasket, I can look online for a part that comes close to the diameter.
Jorge Harley Weston lui répond. 





The square footage of a property 
20071130 

Warren pose la question : The west property line is 240' long with a 90degree angle to the south property line.
The south property line is 493' long with a 90degree angle to the east property line.
The east boundary is 165' long.
The length of the north property line is not known but it is a straight line from the north end of the east property line to the north end of the west property line.
Could you please tell me the total square feet and how many acres?
And how you calculated the answer Penny Nom lui répond. 





An arched entry 
20071128 

amber pose la question : i am working with an arched entry. i know that the radius is 25' and the height is 20'11". i need to know the length of the arch and degree of bend of the arch. how do i find these? Stephen La Rocque lui répond. 





Straight lines 
20071126 

Divyansh pose la question : hello
i am in eleventh class and am, preparing a project on straight lines
i cant really find uses of straight lines and its equations in daily life
i am also thankful to you in advance and am waiting for your answer eagerly because i need to submit my project only this week
thanking you Penny Nom lui répond. 





Area of a 17sided lot 
20071121 

Lynda pose la question : My uncle is wanting to buy this piece of land [a 17sided polygon] but we are questioning the acerage total. the measurements are [on the attached diagram]. Stephen La Rocque lui répond. 





How many yards of fencing do I need? 
20071116 

Terrie pose la question : I have to order fencing for a 25acre, rectangular field.One side of the field is 1/4 mile. How many yards of fencing do I need to enclose the field? Stephen La Rocque lui répond. 





A cylindrical tank 
20071116 

Mario pose la question : I want to determine how many gallons i have inside a cylinder (tank) that is resting on its side (the Height), NOT standing up.
I know V=pi x r2 x H. And 1 cubic foot = 7.48 gallons. Here are the dimensions r=2' H=20'. Now my question is how do I determine how much
liquid i have inside, if the level of the liquid is about 1/2 of the way of its Diameter (in other words 2'). Remember this cylinder is lying
on its side. Penny Nom lui répond. 





How many yards of dirt? 
20071116 

wade pose la question : i own 4acres of land and would like to fill it with 10inches of dirt can you tell me how many yard of dirt it will take to do so Penny Nom lui répond. 





Our company charges a 4% margin 
20071113 

Nadja pose la question : Our company charges a 4% margin on top of a pay rate to obtain the total charge rate. A
client is denying that the total charge rate is calculated in the following
way:
Pay rate/0.96 = Charge rate
Please could you provide me with an explanation which I can pass on as
to why it is calculated in this way? Penny Nom lui répond. 





Is there a practical use for radian measure? 
20071026 

Paula pose la question : Is there a practical use for radian measure in any profession? Which professions might us radian as opposed to degree measure? Harley Weston lui répond. 





I need to rebuild a wagon wheel 
20071026 

Pat pose la question : I need to rebuild a wagon wheel, the metal wheel rim is 41" diameter, inside the rim is a one and a half inch by one and a half inch wood wheel.
I thought I would glue up a hexagon from a 2x6 or 2x8 piece of wood and then draw and cut out the 41" diameter wood circle.
? what would work better the 2x6 or the 2x8 and what is the lenghth of the cuts needed in order to give me the 41' diameter I need. Harley Weston lui répond. 





Stanley Cup costume (truncated cone pattern) 
20071019 

Janet pose la question : You hockey fans will love this question. I am making a Stanley Cup halloween costume and need a flat pattern for the bowl portion. I believe a truncated cone will work nicely. Base circumference needs to be 32" (10.19 diameter). Top circumference needs to be 44" (14 diameter). It needs to be 8" high. Thanks for your help. Stephen La Rocque lui répond. 





An octagonal table 
20071018 

Lorne pose la question : I am 77 years old and want to build a table top with each side measuring 23 inches.
I believe the diameter would be 55.5 inches. Is this correct and what is the angle of the cuts I have to make? Thank you for your patience. Penny Nom lui répond. 





How many cubic yards of dirt do I need? 
20071016 

BELINDA pose la question : I need to fill an area of 30,000 square feet with dirt that is 18" in height. How many cubic yards of dirt do I need to do this? Penny Nom lui répond. 





A 9 team league 
20071011 

Dary pose la question : I have a 9 team pool league. Each team must play each other once only. But 2 teams cannot play at the same place location each week. I can't seem to match this up and I get stuck. Victoria West lui répond. 





Mixing cement 
20071009 

Sandra pose la question : How many bags of cement do I need for a floor for a house that is 8meters long, 8meters wide and 50cm deep. Stephen La Rocque lui répond. 





calculating percentages for my class 
20071009 

Cori pose la question : I teach a class in which there are seven projects/quizzes worth 10% each,
and the midterm and the final are each worth 15%. No problem figuring out
their final grade, but I have to give a midterm average, having only FOUR
of the seven 10% things, and the midterm test. The closest I've come to
an accurate "average" is to just add them together (as equals) and average them. Victoria West & Harley Weston lui répond. 





Golf pairings 
20071002 

Mike pose la question : Regarding arranging golf players so no person plays with anyone more than once.
You have given examples for 16 and 24 players. If it can be done, i need a
solution for 20 players, 4 players per team one round per day for 5 days Victoria West lui répond. 





The amount of dirt 5 feet deep over a 50 acres 
20071002 

Debbie pose la question : Please tell me how to calculate the amount of dirt stripped 5 feet
deep over a 50 acre site. How do you calculate the amount of dirt in an acre
and then excavating it a certain depth. How does one calculate the amount of
dirt excavated and moved and how to price to charge for the service? Stephen La Rocque and Victoria West lui répond. 





Irrational functions 
20071001 

alicia pose la question : i have a question about irrationals functions.
i have been using them quite some time now, but i wonder where they can be found in daily life?
i hope you can help me, Harley Weston lui répond. 





400 square yards of sidewalk 
20070927 

Vanessa pose la question : I am having a small problem being a subcontractor
I'll having trouble calculating how much concrete it will take to pour a 400 square yard sidewalk 5' wide 4" depth can you show me the equation to figure out how many yards of concrete i will need. Can you help me please?
Thank you very much and have a wonderful day. Penny Nom lui répond. 





The incline of my yard as it slopes away from my house 
20070922 

Janet pose la question : I need to calculate the degree (or is it percent?) of incline of my yard as it
slopes away from my house. Do I visualize a right angle formed by a
level line from the bottom of the slope to the side of the house, and then
compare the line of the slope against the right angle to get the degree?
Or is an incline calculated by the measurement of the rise in 100 feet? For
instance, if the ground rises 3 feel in a distance of 100 feet, is that a 3%
incline? And if it rises 4 feet in a distance of 25 feet, is that a 16% incline?
Thanks so much. Stephen La Rocque lui répond. 





Area of an irregular lot 
20070920 

Joanne pose la question : I found your web site through ask.com & it's great. Really hoping you can help me. We are looking at purchasing an existing home with a lot size that is advertised at 2.04 acres, however, even with my limited math skills I know this is not correct.
Their calculation takes the deepest part of the lost (179 feet) multiplied by the widest part of the lost (497.26 feet) as if it was a perfect rectangle. As you can see from the faxed diagram it is far from rectangular in shape.
Can you advise as to the true lot size? As I mentioned we are looking at this property as a purchase so time is of the essence.
I have also faxed this information (with the diagram) to the number listed on your web site. Thank you so much for your help. Harley Weston lui répond. 





Filling a planting bed 
20070918 

Luke pose la question : How many 40lbs bags will it take to fill area 21feet long 45inchs wide 9 inch deep? Penny Nom lui répond. 





How do I determine how many tons, 15 yards of top soil is? 
20070918 

Terry pose la question : One company is selling topsoil by the yard and another by the ton,
how do I determine how many tons, 15 yards of top soil is? Penny Nom lui répond. 





How much stone will be needed to fill the trench? 
20070914 

Debbie pose la question : A trench 100metres long 1ft wide*18inches deep with a 4inch pipe laid. How much stone will be needed to fill the trench.
How much weight in stone would I need to fill it? Penny Nom and Victoria West lui répond. 





Two inches of topsoil 
20070910 

Nick pose la question : I have to cover a 5,300 square feet area with topsoil 2" deep. How many yards would I need? Harley Weston lui répond. 





How many cubic yards of concrete? 
20070831 

Teresa pose la question : How many cubic yards of concrete are required for the structure with a bottom piece that is 8" high by 72" by 72", a side that is 8" by 72" by 60", another side that is 8" by 72" by 60 ", a side that is 8" by 72" by 60" with a circle cut out that has a radius of 18", and finally another side that is 8" by 72" by 60" that has a circle cut out that has a radius of 12". Stephen La Rocque lui répond. 





Is there a way I can calculate correct square footage for odd shapes? 
20070831 

Tom pose la question : I manage a golf course, and we are about to over seed the course for the upcoming winter months. We will be over seeding all greens, fairways, and tee boxes. Noone of the area that we will be placing seed on is a regular shape. The closest shapes they would be is a circle, rectangle or square, but most of them are all odd CURVED shapes. I know what the equation is for Square ft., and I know how many Square ft. are in an acre, but I need to be precise with the amount of seed I order. Is there a way I can calculate correct square footage for odd shapes. Harley Weston lui répond. 





Applications of sequences and series 
20070827 

Trish pose la question : I'm a grade 12 learner working on a math project based on sequences and series. I'd like to know the different types of sequences and series such as fibonacci, fourier, farey, etc.
I've already used the Fibonacci Sequence and Harmonic Series
and need two more.
The simpler the sequence or series type the better.
I'd also like to know in which nonmathematical areas use sequences and series
and how.
Areas such as engineering or science. Penny Nom lui répond. 





Filling an old swimming pool 
20070827 

Russ pose la question : I would like to know how much fill material I would need to fill an old swimming pool. The pool is 18' wide x 36' long and is 4' to 10' deep. Penny Nom lui répond. 





Where do you use trigonometry? 
20070821 

jenny pose la question : where do you use trigonometry besides architecture and engineering? Stephen La Rocque lui répond. 





Markup 
20070820 

Drew pose la question : I own a manufacturing business and I need to figure out the best way to mark up our products so that we can make a profit for this year. Say for instance we have a plow that we can make for $938.00. We need to mark it up 20% so that we have some income. Do we take the $938 x 20% = $1125.60 or $938 / 80% = $1172.50? Stephen la rocque and Harley Weston lui répond. 





I want to fill the hole up with dirt 
20070819 

Roger pose la question : I have an 18 foot round hole which is 16 inches deep. I want to fill the hole up with dirt. How much dirt do I need to fill the hole?? Penny Nom lui répond. 





The area of a five sided lot 
20070819 

Karyn pose la question : I have been looking at your site, but I am still confused as to how to
figure out the exact square footage of my irregular lot (since it is a gradual fan
lot from the front, and triangles out in the back). Harley Weston lui répond. 





Water bill woes 
20070812 

Terry pose la question : I know that a cubic foot of water=7.48051945 gals., but I keep getting my water bill and they go by thousands of a gal. per cubic foot. Is there a conversion that says that shows this? Water department=.763 x cubic foot used=thousands of gallons water used that month. Exampel: 72cu. ft meter reading x .763+ 58. galons of water I use in a month. Total 58=thousand = +gallons. This is wrong. There are only two people in the house. Stephen La Rocque lui répond. 





GST and PST 
20070811 

Cynthia pose la question : I paid $15.98 for an item. Both GST (.96) & PST ($1.12) were added for a total of $18.06. I know that .96 is GST (6%) and $1.12 is PST (7%).
Other than looking at the receipt, if all I have is the total amount paid, how do I calculate how much of the total are taxes? Penny Nom lui répond. 





An old bike lock 
20070808 

Jeremy pose la question : I have an old bike lock i found in the garage of the house i just moved in to. It has four columns and the nubers are 1 through 6. I understand that there are 1236 (6x6x6x6) possibilities. Is there a graph of all the possible combinations cuz i looked all over the web and couldn't find one. Penny Nom lui répond. 





Dirt in a sloped round hole 
20070803 

Ken pose la question : How much dirt do I need to fill a ground hole 20 ft in dia. with a sloping floor that has a ht. of 5" on one side and 12" on the other side? Stephen La Rocque lui répond. 





A gas tank 
20070801 

Randy pose la question : I am trying to determine the size of the gas tank on a used truck I just purchased. There is no tag on it showing the size. It measures 50" wide by 12" high by 18" deep. How many gallons of gas does it hold? Penny Nom lui répond. 





An irrigation ditch 
20070731 

Kevin pose la question : I would like to know how many cubic yards of concrete I would need to fill a section of irrigation ditch that measures 12 inches on the bottom, 40 inches on top, 16 inches high and 20 feet long with a 18 inch diameter, 20 foot long culvert sitting in the ditch (to remain open). I am trying to build a roadway across the irrigation ditch. Thanks very much. Penny Nom lui répond. 





Building a garage 
20070729 

charles pose la question : I want to build a garage that is 24 feet 4 inches wide by 50 feet long.
can you please tell me what the length of one corner is to the other? Penny Nom lui répond. 





320 acre lots 
20070729 

melisa pose la question : we are splitting a 320 acre parcel into five 35 acre lots with one 145 ace lot. I have the footage of each side there are eight:
5280 x 2640x2640then out1320x1320up x2640back inx1320upx1320this now would meet back to the 5280foot side i know there is a half of a square mile and 320 acres.what would the measurements be in feet for length to make a square or a rectangle to make a 35 acre lot? Harley Weston lui répond. 





A pile of soil that is 284' around and 12' high 
20070726 

bev pose la question : I have a pile of soil that is 284' around and 12' high. I need to know how many yards are in that pile. And then how do I convert that to cubic yards Penny Nom lui répond. 





The volume of a cistern 
20070719 

sharon pose la question : We have a cistern to hold spring water that measures 12 feet in depth by 5 feet in diameter. How much in liquid gallons will it hold? Penny Nom lui répond. 





Pythagoras theorem in daily life 
20070717 

sana pose la question : i would like to what are the 5 practical uses of the Pythagoras theorem in
daily life??? its for a math project
thanx a lot
sana Penny Nom lui répond. 





Five button push lock 
20070706 

Jeffrey pose la question : We have a 5 button push lock and we were wondering how many different codes were possible in this situation. In this lock each button can only be pressed once (ie it's not a numbered key pad) and order matters. How would we find out the # of possible codes? Stephen La Rocque lui répond. 





Tons of concrete 
20070703 

Trey pose la question : I have 300,000 square feet of concrete and want to know how to convert this to tons? Harley Weston lui répond. 





The volume of a pool 
20070703 

maria pose la question : we have a pool that is 2 feet by 5 feet by 3 1/2 feet  how many gallons of water does it hold Stephen La Rocque lui répond. 





I need to provide 712 cubic feet to water storage capacity 
20070703 

William pose la question : I need to provide 712 cubic feet to water storage capacity.
If I use 15 inch diameter pipe, what would the length need to be
to provide the capacity? Stephen La Rocque lui répond. 





The combintion of a bike lock 
20070701 

Tricia pose la question : I have a bike lock that I know the numbers 3, 6, 8, & 9 are part of the combination, but I can't remember the order. What is the calculation to get all of the possible combinations. Stephen La Rocque lui répond. 





A sand base for a pool 
20070701 

Clark pose la question : I am adding sand for a base for a pool. It is 20' round and I would like the sand
to be 2" deep. Can you tell me how many cubic feet that would be?
Thanks! Harley Weston lui répond. 





A cylindrical slab of concrete 
20070630 

Kenn pose la question : I have a tank that needs a base of cement put in it. I dont know how to do this. The tank is 8 feet across and I want the cement to be 5 or 6 inches deep. Can you please tell me how much cement I need to do this. Harley Weston lui répond. 





The lock code for my phone 
20070630 

Amanda pose la question : okay so i forgot my lock code for my phone its four digits but i know it doesn't have a 1 or a 0 in it so it has to be from numbers 2 to 9 i need to know all the four digit combinations asap cause i cant use my phone till can someone please help me Amanda Penny Nom lui répond. 





Edging around a pool 
20070626 

Celeste pose la question : I have a 27ft. above ground pool. I want to put edging around it but do not know how many feet of edging I need. Can You help? The edging will be approximately 2 feet away from the pool. Penny Nom lui répond. 





How many tons of sand? 
20070619 

Richard pose la question : I need to know how many tons of sand it would take to fill a container 20 feet
long, 20 feet wide, and 6 inches deep. I am not sure of the makeup of the sand as
far as dry, loose, wet, etc. If you could give me calculations of all the variants it
would be appreciated. Stephen La Rocque and Penny Nom lui répond. 





How fast was he going? 
20070603 

Mary pose la question : if a motorcycle left a 63 foot skid mark before hitting a car how fast was he going ? Penny Nom lui répond. 





The surface area of a fire hose 
20070526 

Vanessa pose la question : Why do we need to find the surface area of a fire hose (cylinder). Stephen La Rocque lui répond. 





Mulch price comparison (price per cubic yard versus price per cubic foot) 
20070523 

Dianna pose la question : This is a 2fold question. I am getting some mulch that is measured in 1 cubic yard for $25.00.
Walmart has a 2 cubic bag for $3.00. I need to cover a 376 sq ft area. I need to know which is
the best deal and how much I need to buy to cover the 376 sq ft. Stephen La Rocque lui répond. 





How many tons of dirt is this? 
20070523 

Deb pose la question : I need to know how many tons of dirt(6 inches deep)would it take to cover 8 acres? Stephen La Rocque lui répond. 





Lot acreage 
20070521 

Sherri pose la question : I have a lot that is 2565 x 1056 x 2636 x 285 that is roughly in the shape of a triangle, with the small strip on the top of the triangle, that I would like to figure the sq. footage for. Could I draw a line from one corner on the top to the opposite corner on the bottom and get the area of those two triangles, then add that together to come up with the sq. ft.? Stephen La Rocque lui répond. 





Converting yogurt 
20070521 

Annie pose la question : I'm trying to follow a diet plan. The diet says I should have a 125ml tub of natural low fat bio yogurt. The only problem is, the yogurt pot lists its weight as 150g (with a large 'e' after it). Can you tell me how much of the yogurt pot I'm suppost to have please, or give me a conversion chart to change from g to ml for natural bio yogurt? Stephen La Rocque lui répond. 





Converting mass of sand to volume (a sand ceremony) 
20070521 

Linda pose la question : I'm getting married. We are having a sand ceremony. The empty bottle we are using holds 800ml. I have bags of colored sand. Each bag is 30g. There is 7 people participating in this ceremony. What I need to find out is how many grams of sand i need for 7 people to participate to fill this jar. Penny Nom lui répond. 





Parabolas in the real world 
20070518 

Katherine pose la question : Hi, my name is Katherine, and my mean old math teacher just assigned us a test in which
we have to write two examples of how parabolas are used in the real world, each one page
single spaced, size 12!! I know you have already answered some questions like this, but
I still don't understand the whole baseball thing, and any other way parabolas are used.
And how I can write a whole page on it. But that's my problem, not yours, I just need help
with a little explanation on how parabolas are actually used today. I know this might be kind
of confusing for you, but imagine how it is for me!! Stephen La Rocque lui répond. 





Buying topsoil 
20070516 

Claudia pose la question : I am trying to figure out if it is cheaper to buy topsoil by the bag (one 40lbs bag for $1.66) or having it delivered for $60 for 4 cubic yards. Penny Nom lui répond. 





4 digit lock 
20070516 

Kathy pose la question : Hi,
My name is Kathy and I'm a REALTOR, I have 2 different lockboxes that
I cannot remember the combinations for, so what I need is all the
different combinations for 4 digits that cannot be the same, i.e. 0123.
Can you help me out? I would hate to throw them away as they cost
about $30 each.
Thank you,
Kathy Stephen La Rocque lui répond. 





Volume of a wedge 
20070514 

Mark pose la question : We need to fill in dirt along a 75 foot long fence, 3 feet out , statring at 6 inches agaisnt the fence, sloping to 2 inches at the grass. I am trying to calculate the volume to order enough cubic yards of dirt to fill this. Stephen La Rocque lui répond. 





Lot size / acreage (more than three sides) 
20070511 

Martha pose la question : What is the lot size of the following dimensions equivalent to acre.
141.85 x 52.55 x 217.63 x 38.89 x 68.08 Penny Nom and Stephen La Rocque lui répond. 





Pattern for a truncated cone 
20070511 

Mike pose la question : I have been trying to get this cone flat so I can build this column. Can you please help me so I can figure this out? Thanks for your help. Stephen La Rocque lui répond. 





Area of a pentagonal lot 
20070509 

Mimi pose la question : I would like to know the square footage of a pentagon with the
following measurements:
Property is .43 of an Acre
Front: 57.11'
NW: 105.78'
S: 120'
SE: 145'
E: 102.86'
I don't want you to try to show me how to work thru the problem since
I will never comprehend it. For some reason, I am unable to perform these
kinds of equations. I will greatly appreciate your help. Penny Nom lui répond. 





Cubic feet of sand 
20070509 

Paul pose la question : I have an above ground pool that is 585 sq feet. I want to cover the bottom in 3 inches of sand. The sand supplier says I need about 6 cubic yards, based on your prior answers on this subject. I come up with 1.8 yards. What is the correct amount? Stephen La Rocque lui répond. 





Uses of pi 
20070508 

Kari pose la question : How is pi used in real life? Penny Nom lui répond. 





Square footage of a lot 
20070503 

Linda pose la question : I have two lots which I am trying to calcuate the square footage of
one lot is 50 x 285.72 x 50 x 270
2nd lot is 50 x 285.72 x 50 x 277.61
Any help would be appreciated. The answers would be GREATLY
appreciated. Penny Nom lui répond. 





Reverse Calculation of GST and PST in Quebec 
20070503 

Derek pose la question : Could you please tell me how to figure out the PST and GST paid on an item.
Example: I paid $10 total (including taxes) and the GST is 6% and the PST is 7.5%, HOWEVER, in Quebec, we pay the PST on the subtotal+GST.
Thanks, Derek Stephen La Rocque lui répond. 





The grade of a shoulder 
20070428 

Robert pose la question : I am building a road with a 1.2 meter shoulder. The plan calls fo a 6% shoulder grade. When I use my metric calculator I come up with a different answer when I multiply 3/4 of an inch by 1.2 meters and when I multiply 1.2 meters by .06%? Penny Nom lui répond. 





The size of a freezer 
20070423 

Jacqui pose la question : How many can packages can fit? I have a freezer that is 7cf. But
it contains a little tray component. The freezer measurements without the
tray is(bear with me, I'm not good with LxWxD) 23 across x 16 W x 25
deep (I'm assuming depth) and the tray is 8 across x 16 w x 15 D. We are
trying to see how many 9 L x 6 W x 3.5 D packages can fit in the freezer.
Please help me. I'm getting app. 60. I need 84 to be able to fit. Penny Nom lui répond. 





Constructing an octagonal deck around a circular pool 
20070420 

Cliff pose la question : [I am building an] octagonal desk encompassing 17 foot diameter circle for pool.
I have seen other octagonal calculations but none of these tell me how much allowance for a circle to fit within the octagon without losing the circle edge can anyone help
thanks cliff Stephen La Rocque lui répond. 





Relating volume to depth in a cylindrical container 
20070419 

Dan pose la question : I have a cylindrical polyethylene rain barrel 23" in diameter and 35" high. If I've calculated correctly thus far, its volume is:
14, 547.49 cubic inches (or 8.418686 cubic feet or 0.31 cubic yards)
and could, ideally, contain 62.6 gallons of rain water whose weight would be 525.32 lbs. (62.4 lbs./cubic foot X 8.418686).
I'm having difficulty relating inch depth markings on the side of the barrel to volume capacity; i.e., how many inches in depth
in a cylinder of the size given would = how many gallons (or quarts) of water. The barrel stands upright on its end and is, thus, 35" high
when oriented in this fashion, much as a 55gallon oil drum appears when similarly stowed.
Dan Watley Stephen La Rocque lui répond. 





Fractions! Fractions! Fractions! 
20070416 

Maria pose la question : Why are fractions important for:
1) The study of Mathematics
2) Real life Haley Ess lui répond. 





A wooden hexagonal pyramid 
20070412 

David pose la question : Im trying to form a hexagonal pyramid out of plywood and need to know the height to the center point of the pyramid. I want to use standard 4x8 sheets of plywood and split them diagonally. Then with the resulting triangles combine them to form one triangle. Then i want to accumulate 6 of these triangle total and put together to form a hexagonal pyramid. Stephen La Rocque lui répond. 





An arc shaped groove into a peice of metal 
20070412 

daniel pose la question : hello i work at an engineering workshop the other night i was asked to machine an arc shaped groove into a piece of metal the cord length was 6 mm and the height from the middle of the cord to the arc was 1mm i was hoping to find the diameter of the cutter needed to do the job and also the formula to work out how to find the diameter. i believe it is 10mm dia thankyou for your time and knowledge Stephen La Rocque lui répond. 





Yards of sand in a ton 
20070409 

Teresa pose la question : how many yards of sand are in a ton and how many yards of limestone does it take to make a ton Penny Nom lui répond. 





A cabinet with an arched front 
20070409 

Joe pose la question : I am building an arched front cabinet that is 71 inches wide, 12 inches deep at both ends
and 16 inches deep at the center. To accurately build this cabinet I need to known the radius of
the circle that would form that arch.
Thanks,
Joe Penny Nom lui répond. 





An arched opening for a large doorway 
20070408 

Richard pose la question : I am trying to build an arched opening for a large doorway...I know the vertical sides of the opening to be 8'9" from the floor to the lowest point of the arch on each side...I know it is 15 1/2" from the center horizontal point to the top of the arc...I know the vertical sides are 11'11" apart...what I need to know is the radius to create the proper arc. Can you help? Stephen La Rocque lui répond. 





The area of a parcel of land 
20070403 

Ricky pose la question : I need the attached land parcel (#0436) converted to acreage.
This would be of great help to me.
Thanks,
Ricky Penny Nom lui répond. 





A "claw setting" for a gemstone 
20070330 

Stephanie pose la question : I'm trying to make a cone out of a flat sheet of metal for a "claw setting" for a gemstone.
The cone must be 8mm wide at the top and 11mm long tapering to a point. But because the prongs must be cut out of the top the cone should not start to taper for a length of 3mm from that top 8mm. The 3mm prong is then bent over the 8mm stone. That probably doesn't make enough sense. But I don't know how to explain it. If it helps a claw setting is the very common prong setting for engagement rings or earrings. Please help as soon as possible as this is a commissioned piece for someone and I'm running out of time. I don't remember any math really from high school so please make the instructions really easy to follow. Thank You!! Penny Nom lui répond. 





How many tons it will take to fill in this area 
20070329 

Amy pose la question : I have to fill an area with millings (crushed stone). The measurements are 14 foot long, 14 foot wide, and a depth of 6 inches. How do I find the square footage and how do I convert that into tons?
I need to know how many tons it will take to fill in this area. Penny Nom lui répond. 





6 team schedule for softball 
20070329 

Angie pose la question : I have 6teams that can only play 3 days a week. Each team must get 18 games in for the season. I have to split them being the home team and the away team sometimes. Penny Nom lui répond. 





How many yards of gravel do I need? 
20070328 

Joel pose la question : I am constructing a French drain 100 feet long x 6 inches wide by 18 inches deep. Within this trench will be a 4" diameter pipe which will be surrounded by washed gravel. How many yards of gravel do I need? Thanks! Stephen La Rocque lui répond. 





The volume of a hopper 
20070323 

amitesh pose la question : Let me know how to calculate the tonnage of hopper / bins / chutes of different sizes and dimensions. Penny Nom lui répond. 





Examples of algebra used in life 
20070321 

Arianna pose la question : i need to find about 5 different examples of algebra used in life, and im not sure where to start. does anyone have any suggestions as to topics that i should choose for my project?
thank you so much for all of your input.
Arianna Leigh Penny Nom lui répond. 





28 golfers playing golf over 7 days 
20070320 

ian pose la question : I have 28 golfers playing golf over 7 days
I would like everybody to play with each other at least once
Is there a schedule?
Thank you
Ian Penny Nom lui répond. 





How may litres are in my fish pond 
20070318 

beryl pose la question : I need to work how may litres in my fish pond.
I have measures it in two sections because of it shape.
One section is 1600w, 1100L, 540D.
the other section is 1060W, 1800L, 380D.
Thank you
beryl Penny Nom lui répond. 





Percentage markup 
20070316 

Debbie pose la question : What formula or formulas do I use if I want to ultimately charge a customer $300 for a service, but need to factor in a 15% commission for a sales rep, $20 to cover the cost of our overhead, the cost of a $25 coupon that we will be sending to the customer to apply to future services. In other words, what amount do I initially quote the customer to be able to cover these costs? Stephen La Rocque lui répond. 





The area of a property 
20070314 

Greg pose la question : Hi my name is Greg. I have a piece of property I am trying to buy,
but need to find out the square feet of it first.
The four sides are unequal lengths and none at a right angle or
parallel. Here are the measurement in feet.
The base of the square is 29.12 feet in width.
The right side of the square is 44.33 feet high.
The top of the square is 28.80 feet in width.
The left side of the square is 46.20 feet high.
I have not done this math in ages and really need your help. Harley Weston lui répond. 





A truncated cone 
20070310 

Russell pose la question : Hello, I have attempted to use two of your answers already given and had no real success. This young lady is making a cat food dispenser using a truncated cone. The top of the cone as a diameter of 5 inches with a height of 6 1/2 inches and diameter of 3 inches for the bottom.
Could you please map out a solution for the both of us to understand? Thank you so much for your time and for this wonderful service.
Russell Penny Nom lui répond. 





How many barrels would this container hold per inch? 
20070310 

LaDonna pose la question : My container is 50" across and 40.5' ft. long. I believe it would hold 140 barrels. If measuring, how many barrels would this container hold per inch? Penny Nom lui répond. 





A steel pipe pile 
20070308 

Sean pose la question : Need to fill a 18" OD x 60 feet steel pipe pile with a wall thickness of 1/2" What is the amount of concrete I need in order to fill? Thank you Stephen La Rocque lui répond. 





A fountain as a parabola 
20070308 

Emily pose la question : I have to do a math project proving that something in real life is a parabola. I really need some help here because i don't know where to start. I want to do it on a fountain and prove it's a parabola but how do i do that? I would really appreciate it if you could help Emily Stephen La Rocque lui répond. 





Chords and arc lengths 
20070308 

Angela pose la question : my dad, who is a welder, asked me a question pertaining to chords and points on an arc to which I cannot for the life of me find an answer or an equation. if you could help, it would be much appreciated. I am sending an attachment of the problem. Stephen La Rocque lui répond. 





A metal shroud for a outdoor fireplace 
20070306 

Arnold pose la question : I am making a metal shroud for a outdoor fireplace, it is basically a lampshade type pattern,like the bottom of a cone.The top has to be 6 inches to fit the 6 inch stovepipe,and the bottom will be a 24 inch circle. the sides will be 18 inches in length.With the cost of the sheet metal,I can only afford to cut this out once,can you help me with the pattern ? Penny Nom lui répond. 





One acre of water, one foot deep 
20070305 

Jeff pose la question : If you have one square acre of ground flooded with one foot of water and a pump that pumps 1000 gallons a minute how long would it take to drain the one acre of ground? Penny Nom lui répond. 





The volume of a trailer 
20070304 

Ron pose la question : I just can not seem to work this out, i think it is old age catching up with me, I am buying a trailer that is 25 feet long 7.5 foot wide and with 4 foot sides and i am trying to work out how many m3 it will hold can anyone help. Thank you in advance for any help. Regards Ron Penny Nom lui répond. 





A long narrow cone 
20070304 

Amy pose la question : I am an art student making a piece of jewelry out of a flat metal sheet. I'm trying to make a long narrow cone that's roughly 3 1/4" long and just slightly under 1" wide at the base. Since I'm no math wiz, I'm having a really hard time. Please help. Penny Nom lui répond. 





Slope 
20070302 

Lacey pose la question : My algebra 2 class is researching graphing and slope and we would like to know how we use graphing and slope in everyday life. So if you could get back to me with some real world examples i would really appreciate it. Thanks for your help! Steve La Rocque, Penny Nom and Sara Ulmer lui répond. 





How many yards of concrete? 
20070228 

jeremy pose la question : I need to figure how many yards of concrete to use. I work for an asphalt company, and we are expanding into concrete. Currently we measure everything in sq. ft. So we came up with 6,960 sq ft of concrete to remove and replace. Currently there is 6" of concrete, and 2" of bedding material. We would like to replace only 4.5" of concrete, the rest in bedding. Here is how I figured, am I correct. 6,960 Sq ft (to simplify I made the Sq ft 350 X 20 ) 350 ft X 20 ft X .33 (1/3 ft or 4") = 2,310 cubic feet 2,310 cb ft / 27 = 85.55 cubic yards Is this correct? Penny Nom lui répond. 





How many cubic yards can my truck hold? 
20070225 

Mike pose la question : If I have a dump truck that has a box that is 14' long sides that are 3.5' high and the width is 7.5' wide... how do I figure out how many cubic yards this truck can hold? Steve La Rocque, Penny Nom and Melanie Tyrer lui répond. 





Circles 
20070222 

Erika pose la question : I have a research paper due on real life uses of conic sections I've looked through all your conic topics and uses of them, but and i cant seem to find real life uses for circles. What are real life uses of circles? Penny Nom lui répond. 





What jobs involve using conics? 
20070221 

Nicki pose la question : What jobs involve using conics? Penny Nom lui répond. 





Things that are shaped like a parabola 
20070214 

carra pose la question : i can't find other examples of things that are shaped like a parabola except for bridges.............. Pls. help it is due tomorrow. thank you very much:) Steve La Rocque, Penny Nom and Walter Whiteley lui répond. 





How many gallons will it hold? 
20070127 

Taye pose la question : I am building a aquarium for my daughter, It is 6 feet long 24 inches high and only 5 inches wide. How many gallons will it hold? Stephen La Rocque and Penny Nom lui répond. 





Splitting a 5 acre piece of property 
20070125 

John pose la question : I have a 5 acre piece of property that I wish to split into 5 individual 1 acre parcels. The 5 acre parcel 1s 660 feet in length and 330 feet in width. The first two parcels are 264'x165', but I am asking for help getting the perimeters of the last 3 lots, one of which is a irregular pentagon. All of the one acre parcels must have an area of 43,560 square feet each. Penny Nom lui répond. 





As many player combinations as possible 
20070118 

Ken pose la question : I coach a 5th grade basketball team with 12 players. I'd like to come up with a way to get as many player combinations as possible with two teams of 6 so that the makeup of the teams is different each time. An example would be: Players 16 on one team and players 712 on the other. Then I could have 1,3,5,7,9,11 on one team and the evens on the other. Then 1,2,6,7,9,10 on one team and the rest on the other. Can you help set something like this up? Chris Fisher lui répond. 





An octagonal bird house 
20070113 

Soren pose la question : I'm in the process of building a birdhouse that is an octagon (based on previous questions, looks like that's a familiar tune). The essential elements are known, but I get stuck when trying to determine the angle for the cuts that would be made to the thickness of the wood so that they all fit together when assembled. Each octagonal section is 7 inches in width and the peak of the roof will be 2 inches higher than the sides. My sense is that the angle cuts that need to be made to the 'height' of each piece of wood. By height I mean the thinnest part of the wood that is neither the length nor the width to use colloquial terms. While it's clear that a slight angle is needed, it would seem that the angle would necessarily change as the distance from the top of any one side to the peak changes. Please advise if more clarification is needed. The 2 inches is random and can be changed if more convenient. Whew! Harley Weston lui répond. 





Calculating rainwater volume 
20061230 

Mark pose la question : Trying to calculate 1" rainfall on a 1000 sq' roof=how many gallons of water would collect in our cistern. Stephen La Rocque lui répond. 





An octagonal birdhouse 
20061230 

Verner pose la question : I am building a octagon birdhouse,what degree would I cut each side of each piece of wood to assemble the birdhouse? Penny Nom lui répond. 





I have to design a lettering on corrugated plate 
20061129 

Tim pose la question : For a client of mine I have to design a lettering on corrugated plate. The lettering has to appear "normal" when viewed from the front (100%) I am so far now to consider the shape of the plate to be two halves of an oval/ellipse. What I would like to know is a way to calculate the percentage in which I have to "stretch" my design in order to let it appear "normal". Stephen La Rocque and Penny Nom lui répond. 





Conic sections 
20061119 

Joyce pose la question : My son has a project on conic sections. I need the following information on Parabola, Circle, ellipse,and hyperbola. He can't find the following information for each conic section: equations with explanations, four uses for each shape and Shape explanation. Penny Nom lui répond. 





Motorcycle expansion chamber design 
20061114 

David pose la question : I'm interested in calculating cone information regarding motorcycle expansion chamber design for example. I guess it's called a truncated cone, from what I've read so far. If I know the center line height, small radius, and large radius of a truncated cone then, how can I calculate the angle (included angle?) the cone forms? I'd like to know the variations of the formula so I can calculate for angle, or length, or one of the diameters if I know the other two measurements. Stephen La Rocque lui répond. 





Some applications of conic sections 
20061113 

Burt pose la question : how are circles, ellipses, and hyperbolas used in everyday life Penny Nom lui répond. 





Ratios, proportions and medicine 
20061025 

Steven pose la question : I don't understand why we need to learn about ratios and proportions because i want to become a doctor and i don't know if i'll ever use this type of math. Penny Nom, Claude Tardif and Walter Whiteley lui répond. 





How do we use fractions in every day life? 
20061019 

Tori pose la question : I am doing fractions in class and we need to write a paper about them. So my question is:"how do we use fractions in every day life?" Claude Tardif lui répond. 





An octagonal room 
20061018 

Rick pose la question : I am a cabinetmaker, and I have a client who has an octagonal room which he would like to be used as a walkin closet. Each side of the octagon is 60" in length. Each wall section is to have a 24" deep cabinet installed on it. I am trying to figure out the width of each cabinet allowing for a 3" space between cabinets at the front corner. Stephen La Rocque lui répond. 





The focus of a parabola 
20061001 

Lily pose la question : I have a mathematical assignment which includes applications of parabolas, hyperbolas and ellipses in the real world. I have been searching the internet and now I am ware that most of the applications of parabolas have a connection with what people call "the focus". However, I do not think I clearly understand what "the focus" of a parabola is. Would you please explain it to me? Penny Nom lui répond. 





I need to cut an octagon 
20060923 

Freddie pose la question : I have a 48 inch square piece of wood that I need to cut into an octagon, help. What's an easy way to just measure and cut it. Penny Nom lui répond. 





Constructing a cone 
20060920 

Suresh pose la question : i want to know the required size of plate for cone rolling,sizes are 2950mm is bottom dia,894 is top dia and 600 is height.I have already read u r answers but i little bit confused ,harely and sue have given useful answers but when i worked both method the required plate size is different. so i like to know which method is easy and correct.and also i like know whether it can be rolled without segment my rolling machine width is 1500. Penny Nom lui répond. 





The square footage of my property 
20060917 

Jack pose la question : I have been trying to calculate the square footage of my property, without success. The measurements are below.
Is there a simple formula that can be used based upon the outside parameters? Or, is there a simple way to calculate the square footage? Stephen La Rocque and Penny Nom lui répond. 





A perpendicular intersection of two barrel vaults 
20060721 

Neal pose la question : I'm wanting to build a series of architectural models of different roman and medieval buildings out of cardboard. Once I have perfected the models I want to print them out on card stock so that school kids (or anyone else) can make the buildings.
A feature of many of these models is the cross or groin vault (a perpendicular intersection of two barrel vaults).
A single barrel vault is easy to imagine as a plane (a rectangular piece of cardboard) that will be folded into a semicircular arch.
The intersection of a second barrel vault and this one is presenting me with problems. The second plane needs to have an ellipse cut into it so that when it is folded into the arch, it will mate up with the curve of the first barrel vault.
Given that the two pieces of card have identical widths (and therefore identical arcs in cross section) is there a way to calculate the ellipse that needs to be cut so that it can be cut before the second arch is folded? Edward Doolittle lui répond. 





I have a ditch how many tons of dirt will it take 
20060625 

Scott pose la question : I have a ditch 200 feet long 10 feet wide and 5 feet deep.How many tons of dirt will it take to fill it? Stephen La Rocque lui répond. 





Designing a garage 
20060608 

A builder pose la question : I'm currently designing a garage and came upon this interesting math problem. I've tried using various methods to solve it but have so far been unsuccessful. I've included a picture as its far easier to show you my question than explain it verbally. I realize it could be done by trial and error but i'm looking for a real solution. Stephen La Rocque and Penny Nom lui répond. 





The area of part of a circle 
20060529 

Larry pose la question : need to find area of a circle between a given line (cord) to the circumference of the circle (see attachment). I often review blue prints of homes and many times have to know the area the home. Stephen La Rocque and Penny Nom lui répond. 





The volume of water in a sphere shaped water tower 
20060514 

Dan pose la question : I work in the water industry, providing automatic controls for water systems. I was wondering if there was a formula for calculating the volume of water in a sphere shaped water tower? With the use of a pressure gauge we know the elevation of zero water {the bottom of sphere) and the overflow elev. (near the top of sphere) I would like to calculate how many gallons are at any elevation in between. Stephen La Rocque lui répond. 





Superimposing images 
20060330 

Laurie pose la question : I am a parent and trying to find real world applications for the math strand that includes superimposing one item on another to determine identical. The Alberta strand is match size and shape of figures by superimposing one on top of the other. I am trying to find a way to put this into context for everyday life. Any ideas? Penny Nom lui répond. 





The area of a block of land 
20060326 

Ronald pose la question :
I have a building block of land with four unequal sides and only one right angle. I want to know the total area (in metres) and how the calculations were carried out.
The four sides are: Rear of property: 9.14 metres
left side: 36.9 metres
Right side: 32.61 Metres
front to street: 27.43 Metres
The front to street and right side constitute a right angle. but there are no others. Penny Nom lui répond. 





Quarts, liters cubic yards and soil 
20060319 

Kathy pose la question : I am trying to find out how many quarts of dirt there are in a yard of dirt. The local flower store sells bags of dirt that are 20 quarts or 22 liters for $1.25 and another store sells a yard of dirt for $25.00. Which is the better deal? Penny Nom lui répond. 





Building a flower bed 
20060317 

Bobby pose la question : I am building a flower bed 60 ft long by 8 ft wide by 3 ft deep. How much dirt will it take to fill it with top soil/dirt. Penny Nom lui répond. 





Cubic yards of dirt 
20060128 

Greg pose la question : How many yards of dirt do i need to cover an area of 1000 ft long, 20 ft wide and 3 inches deep Penny Nom lui répond. 





How do you find the angles in a triangle? 
20060127 

Keith pose la question : How do you find the angles in a triangle if you know the lengths of the sides? Chris Fisher and Penny Nom lui répond. 





The angles in a hexagon 
20060122 

Linda pose la question : My problem is in relation to wood and making a six sided object from it. On my saw, there is a place to set the angle to which you wish to cut. I cannot for the life of me, figure this out. I am starting with a piece of plywood (1/4" x 6" x 18") and need to know what the angle degree would be to make each of the sides match perfectly to form a hexagon. Trial and error just is not working. Can someone help me? Penny Nom lui répond. 





An irregular octagon 
20060120 

Robert pose la question : I am building a poker table which is in the shape of an irregular octagon. I know the table measures 72 inches long and 48 inches wide with two parallel straight sides of equal length and six smaller sides of equal length ( three at each end of the table), what I don't know are the lengths of the any of the sides. Harley Weston lui répond. 





Barrels of oil in a tank 
20060109 

Francis pose la question : How many barrels of oil (42 gallons of oil in one oil tank) would there be in an oil tank that was 15 feet tall and 10 feet across? Penny Nom lui répond. 





The area of an octagon 
20060103 

Nikki pose la question : I want to figure out the square footage of an octagon. i have 8 panels that are 24" wide. Its for my dogs and i wanna know how much room they'll have. Penny Nom lui répond. 





A probability question which resulted from a game of Yahtzee 
20051231 

Robert pose la question : Could someone please assist me with this probability question which resulted from a game of Yahtzee we were playing in Melbourne, Australia on our holidays.
The object on this turn was to throw a “large straight” which is 5 numbers in sequence from 5 dice numbered 1 – 6. A player initially throws all 5 dice and then selects those dice they want to throw again for a further two more times. In this instance the player on their first throw, threw a 1,2,3,4 and 6.
Question: What is the respective probabilities of gaining a straight if they were to –
a) put back say the 6 and try and throw a 5 on the two further throws or…..
b) put back the 1 and 6 and try and throw a 1 and 5 or 5 and 6 on the two further throws bearing in mind that if one of the numbers was a 5 on the second throw they could hold that number and try for a 1 or 6 on the third throw.
I would be most appreciative if someone could assist in showing me how to calculate the probabilities particularly in the second instance (b). Penny Nom lui répond. 





Why do we bother learning prealgebra and algebra 1? 
20051223 

Priya pose la question : My students always ask "Why do we bother learning prealgebra and algebra 1?" and I haven't found an answer to satisfy them yet. Can you help me? My students are from grade 9 to 11. I have tried giving them real life examples in each topic but it just feels like they are not satisfied!!! Penny Nom lui répond. 





Cubic yards of fill 
20051223 

Mike pose la question : And I have a question in regards to the amount of fill needed to bring a vacant lot up to "grade level".
The lot is 112' x 87' and I need to bring in fill to elevate the finished level up 4'. Penny Nom lui répond. 





Percentages in our daily life 
20051223 

Naina pose la question : what are the uses of percentages in our daily life Penny Nom lui répond. 





A sheet metal cone 
20051205 

Laura pose la question : I am an art student and in the process of making a cone out of sheet metal. I am unable to work out the template I need to produce my final cone. The dimensions I have are that the final cone will be 58mm high and will have a diameter of 102mm. Penny Nom lui répond. 





How is trigonometry applied to everyday life? 
20051203 

Yadira pose la question : My question is how is trigonometry applied to everyday lives and functions. Ex: Builders use it but how and what are some examples of the trigfunctions or formulas that they use? Harley Weston lui répond. 





Area of a lot 
20051203 

Ben pose la question :
How do you calculate the area of the following Lot?
I figured the following angles from the deed, which read:
N 86 degrees, 45 minutes E, for 322 feet.
S 10 degrees, 30 minutes W for 113 feet.
N 84 degrees, 30 minutes W for 368 feet.
N 50 degrees, 42 minutes E for 76 feet.
N 40 degrees, 40 minutes E for 15 feet.
There is a discrepancy between two surveyors and I'd like to figure out how to calculate the Area of such a shape. Harley Weston lui répond. 





The sides of an octagon 
20051102 

Royce pose la question : I understand there is a simple calculation to determine the sides of an octagon when you know the distance across the parallel flats. something like .447 . can you help? Penny Nom lui répond. 





A slump cone 
20051027 

Wendy pose la question : we are trying to make a slump cone (used to measure the slump in concrete). It has dimensions of 8" diameter on the bottom, 4" diameter hole on the top and a height of 12".
Please help, it is getting frustrating. Penny Nom lui répond. 





How many cubic yards of dirt will be needed? 
20051027 

Mike pose la question : We are filling in a hole left by the removal of an aboveground pool that was dug into the ground. The diameter is 25' across and the depth is 5'. I wondered how many cubic yards of dirt will be needed to fill this hole. Penny Nom lui répond. 





A conical hat 
20051022 

Manish pose la question : I need to make a conical hat for my daughter's upcoming fancy dress, the circumference of the base(hollow) is 50 cms,the height of the cone is 30 cms,what should be the dimensions of the paper which will make a cone of the beforementioned dimensions? Penny Nom lui répond. 





Labour efficiency 
20050823 

Rob pose la question :
The problem, on the surface, seems very simple and yet has created some controversy among a group of accountants. The problem itself has to do with labour efficiency rates and only involves two variables; standard working hours, and actual working hours. The difficulty lies in deriving an efficiency % from these two numbers.
Standard working hours or the targeted number of labour hours required to produce one widget, which I will represent as "s". Actual working hour or the actual number of labour hours require to produce one widget, which I will represent as "a". Labour efficiency I will represent with "E". The prevailing calculation with which I have a problem with is this:
s/a=E or if s=3000, and a=4000 then 3000/4000=75%
What bothers me about the calculation is that the standard hours get represented as a percentage of the actual hours and in my opinion changes the focus of the calculation from standard or target, where it should be, to the actual hours. I cannot define why, but this just seems inherently wrong to me.
The calculation that I use:
(1+((sa)/s))=E or if s=3000, and a=4000 then (1+((30004000)/3000))=66.67%
My calculation is like a %change from standard calculation. However, there is something that also concerns me about my calculation.
If you substitute 100 for a and 50 for s, then you come to a quandary, because if you plug those numbers into the second equation the result is of course zero % efficient which doesn't sit right with me either. If you plug them into the first calculation you get 50% efficiency which doesn't really seem to work either, because you require 100% more hours to do the same work in this case. ???
Is the first calculation correct? Am I missing something altogether? Are both calculations off base? Harley Weston lui répond. 





Framing an arched wall 
20050812 

Mike pose la question : I'm framing a building wall with a curved (arcing) top section. The radius of the section is 74'6" with a height above finish floor of 16'0". The horizontal run of the arced section is 23' 1 1/2" with a low height above finish floor of 12'4". If I start with a 16' stud at the high end how long are the subsequent studs if they are on 16" centers? Short of laying this out on a tennis court how can I work out the lengths of the studs? Penny Nom lui répond. 





Digging a hole for a pool 
20050608 

Debra pose la question : I need to have dirt hauled away from my built in pool and the haulers are asking me how many yards of dirt there is. How would I figure that out? It is a 24 ft round pool and 3 inches of soil depth was dug out. Penny lui répond. 





An octagonal deck 
20050607 

Scott pose la question : I want to build a octagonal deck. The wood I am using are cut in 8 foot lenghts. What I want to know is if the sides of the octagonal are 8 feet, what is the diameter. Also what are the angles of each side? Penny Nom lui répond. 





The volume of a hopper 
20050528 

Brian pose la question : I would like to know the volume of this rectangular hopper. can you help Penny Nom lui répond. 





Jobs relating to the topics of ratios and proportions 
20050517 

Alexa pose la question : What are some jobs relating to the topics of ratios and proportions other than architects and map makers? Walter Whiteley lui répond. 





A wishing well 
20050328 

Don pose la question :
I am building a wishingwell
out of pieces of 2by4. I have included a picture of a miniature version
of what I want. There are to be ten 2by4 pieces around the well and
I want the circle around the outside of the structure to have a diameter
of approximately 3 feet. How long to I cut the 2by4's to build the
wishingwell.
Thanks,
Don
Harley Weston lui répond. 





The volume of a stock tank 
20050313 

Cord pose la question : I am a farmer and I have recently installed a new stock tank which is 1650" in circumference and 10' deep. How many gallons of water will it hold? Penny Nom lui répond. 





A 6 sided (hexagonal) pyramid 
20050122 

Steve pose la question : im trying to make a 6 sided (hexagon) pyramid, from 6 triangles of 12mm plywood, i know all the angles to cut apart from the one one to join all 6 triangles together. Rough measurements are outer edge (A) of each triangle is 13cm's, length of other 2 sides (B&C) of triangle outside to center is 14cm's with a height of the whole thing together about 6cm's. Chris Fisher and Harley Weston lui répond. 





Quadratics 
20050105 

Usman pose la question : Hi, in my Grade 11 Functions math class we have been assigned the task of finding jobs and careers related to quadratics, I have done many searches but have been unsuccessful, then I saw your website and emailed. I also have to use an example of a math problem that the job uses, then solve it, this will all compile on bristol board for a presentation. I would greatly appreciate it if you could send me some links and references of sources that refer to this subject. Harley Weston lui répond. 





An elliptical table 
20050103 

Roger pose la question : Want to make an elliptical table, say the long (major) axis is 4 feet, and the short (minor) axis is 3 feet. I can construct this figure, but I'm trying to figure out what the exact dimension of a rectangle within this ellipse will be if I make the table a drop leaf type where the drop dimensions are equal for each end of both the long and short axes. Intuitively, it looks like there is one and only one solution. Penny Nom lui répond. 





Construction of a cone 
20041120 

John pose la question : I am a builder working on a project where I need to make a cone. It's a right circular cone with 15" base radius and slant angle of 30 degrees. I want to cut it out of flat sheet metal then bring the edges together to form the cone. Is this enough information? Penny Nom lui répond. 





Practical applications: parabolas and Pythagoras 
20041024 

Connie pose la question : Provide two examples of real life objects that incorporate parabolic shapes. Explain the reason why the parabolic shape was used in each object.
I need at least one practical application of the Pythagorean Theorem. Penny Nom lui répond. 





Pythagoras in everyday life 
20041013 

Tiffany pose la question : I was wondering if you have any reallife uses of the pythagorean theorem that you use in your everyday life. Penny Nom lui répond. 





The area of a lot 
20040929 

Deb pose la question : I am trying to figure out how many square feet are in a piece of property. Start at Point Athen go 140 feet norththen 100 feet due eastthen 300 feet at an angle southeast so that connecting to point A would be a straight line (right angle to first line north.) Penny Nom lui répond. 





An Octagonal playhouse 
20040713 

Levi pose la question : I'm building an octagon playhouse for my son that is 8 feet wide.
what would be the measurements of each of the eight sides. Harley Weston lui répond. 





How much loam to fill a hole? 
20040619 

Harry pose la question : Can you tell me how much loam I would need to fill a hole 15 feet in dia. x 6 inches deep. Penny Nom lui répond. 





Pi 
20040510 

Kim pose la question : I'm a 7th grader at Lakeside Middle School. And I was wondering if you can answer a question for me for my math project. I'm doing a project on pi, and my teacher said to ask an expert like you to ask about how you would use the subject, pi, in real life usage. How would you use pi in real life usage? Penny Nom lui répond. 





A stained glass window 
20040329 

Kay pose la question : I'm doing a stain glass project and it's on a 4 foot across octagonal window...and I'm trying to set up the pattern and I don't know how long the sides are! Penny Nom lui répond. 





Volume of a fuel tank 
20040301 

Mike pose la question : I have a fuel ank for my big truck that has a radius of 24inches and a length of 65 inches. I am trying to compute the volume of fuel in the tank. I tried pie x the radius squared times the length but no usable results.
Can you help me please? Penny Nom lui répond. 





Bundles of asphalt shingles 
20040124 

Larry pose la question : According to my study material 4:12 multiplying factor for shingles is 1.054. The question reads as follows: A building with a floor plan of 3350 sq. ft. and a roof slope of 4:12 will require _______ bundles of standard asphalt shingles. Harley Weston lui répond. 





Cubic yards in a concrete wall 
20040118 

Danny pose la question : I am studing for my contractors exam. I am haveing truble with a few questions. I have the answer to the problems but I dont know how to get them my self. please help
How many cu. Yds. Of concrete are in a wall that is 150' long and 8'4" high an d 8' thick Penny Nom lui répond. 





Inequalities 
20040108 

Michael pose la question : How do you use inequalities in your job and in your everyday life? Penny Nom lui répond. 





Ratios and proportions 
20031231 

Frank pose la question : I would like to know how you use 'ratios and proportions' in everyday life. Penny Nom lui répond. 





Factoring in 
20031216 

Priscilla pose la question : How can you use solving by factoring in real life applications? Harley Weston lui répond. 





Knitting gauge and felting 
20031027 

Sara pose la question :
I wish to create a pattern to knit an item that will then be felted, thus, shrink as a result. In order to determine the proper gauge to use in creating the item, I produced a gauge swatch, noted the original properties and then the postfelting properties. They are as follow: Before Felting: 20 stitches(width) x 20 rows(height)yielded: Gauge: 3.2 stitches(width) and 4 rows(height) = 1" Dimensions: 6.25"(width) x 5.25"(height) After Felting: 20 stitches(width) x 20 rows(height) Dimensions: 4"(width) x 3"(height) How do I calculate the percentage change in size to accurately determine the number of stitches and rows needed to produce the desired dimensions for the finished (felted) item? Penny Nom lui répond. 





Applications of logarithms 
20030916 

A student pose la question : I have a project due in my algebra two class dealing with logs and where they are used in life, but I am having trouble finding websites that relate. So I would really appreciate it if you couldhelp me. Penny Nom lui répond. 





Slope 
20030720 

Brian pose la question :
You are placing a pipe 60 feet long at a slope of 1.5%. How would you figure the amount of drop from the inlet of the pipe tot he outlet of the pipe? and what is the answer . If you are trying to keep a shoulder slope of a road between 3/4'' per foot and 11/2'' per foot . If the shoulder is 10 feet wide, how would you figure how much lower should the outside of the shoulder be than the edge of pavement and what is the answer ? Penny Nom lui répond. 





A geometry problem 
20030708 

Chris pose la question : My name is Chris, I work for a custom fabricator company. I am needing a formula for the Height (H) shown in the attached picture. The picture shows dimensions for my current application. If you could please, assign variables to the dimensions. Harley Weston lui répond. 





How much soil will be removed? 
20030702 

Amy pose la question : My site is 1230' (eastwest) by 1300' (northsouth) and we need to remove 2 feet of soil from the entire site, how much soil will be removed? Penny Nom lui répond. 





Area of a trapezoid 
20030413 

A road builder pose la question : My husband works with asphalt building roads. There are times when one end of the road will be (for example) 100ft wide the other end would be( for example) 200ft wide and he must figure the area in square feet. So far it has been a guessing game because he dosen't have the formula to figure the square feet. Penny Nom lui répond. 





Uses of conic sections 
20030401 

William pose la question : My name is William and I am doing a research paper on conic sections for my 12th grade math class. Part of the project is to find two conic sections in our world today and explain what there purpose is. I really need help in this area because I've been searching the internet for where conic sections are used in our world today and I really can't find anything. If you can tell me specific building or a pyramid that contains conic sections that would be great. Or even something in the universe would be helpful. Leeanne Boehm lui répond. 





A triangle and a circle 
20030321 

Jynks pose la question : We need a formula that we can use to figure this out for work. We aren't math wiz's or students. Basically we know 3 points in space of a triangle, we know the length of each side and the length of the line from apex to base line. Each point of the base line ends upon the circumference of a circle. IS three a way to work out the radius of that circle. Penny Nom lui répond. 





The origin of integers 
20030319 

Travis pose la question : What are the real life usages of integers? Also what is the origin of integers? Harley Weston lui répond. 





A question on combinations 
20030306 

Jose pose la question :
I'm an architect student and have a question on combinations. I have a grid of 3 x 3, hence a total of 9 spaces. I have 3 elements to place in this grid. How many possible ways are there of arranging this elements on this grid ? (order, orientation not important) First putting the elements each in its own space and secondly allowing the elements at a given moment to "share" one space. Since I got kind of obsessed with this I went ahead and graphically did all the combinations allowing "sharing", a grand total of 729. How could I have known this before hand ? Penny Nom and Claude Tardif lui répond. 





Excluded values 
20030222 

Josh pose la question : Why do you think it is necessary to include the "excluded values" when you write your answers to rational expressions? Penny Nom lui répond. 





Filling in the back yard with dirt 
20030204 

Joe pose la question :
We just bought a house and need to start filling in the back yard with dirt to level it out. I measure 37'x 56' by 2' deep on an angle. I will be building a retaining wall at the 2' deep portion. The slop will go from the 2' to nothing at the top or near the house. I can't remember how to get the Sq. foot or cubic yards. Penny Nom lui répond. 





Cubic yards in a gravel pile 
20030110 

Ron pose la question : I am looking to find a way to measure gravel piles to get yards. They are generaly not square.it would be like pouring sand out of a bag into a pile. they generaly are concave in dimension. can you help. I have attached a picture to show a small scale what I am working on is in much larger volume. Harley Weston lui répond. 





The area of my lot 
20030107 

Linda pose la question : I have a lot that is 210 feet in the front, 240 feet in the back and the sides each measure 150 feet. How many square feet is this all together and how close to an acre is it? Penny Nom lui répond. 





Decimals in everyday life 
20021124 

Fritz pose la question : How do you use decimals in your every day life? Penny Nom lui répond. 





Integers in real life 
20021015 

Rica pose la question : What are the real life usages of integers? Peny Nom lui répond. 





Parabolas 
20020203 

Kuang pose la question : Who is credited for working with or studying the Parabola? What is a conic section? What does a parabola look like? How is a parabola formed? Where and how are parabolas used today in the real world? Harley Weston lui répond. 





The size of a lot 
20020126 

Claudia pose la question : I own a piece of property that I need to know the square feet for assessment purposes. The figure they came up with is wrong. They measured from one point to another and halved the sums but that means I own the cul de sac and we don't. My lot is 55 feet wide and one side is 108.96 feet and the other side is 146.04 that extends all the way to a circle. The front of the lot on the cul de sac is stated on the survey like this. 78.21 feet where R=40 feet. This large arc is taken off the size of our land. How many square feet is our lot. Harley Weston lui répond. 





Integers 
20011202 

Alison pose la question : How do you use integers in your everday life? Harley Weston lui répond. 





Ratios and proportions 
20011126 

Adam pose la question : I am doing a project where I come to this website and ask a math expert about a certain topic. My topic is ratios and proportions. Can you please tell me what your job is and how you use ratio's and proportions in your job. Can you also please explain what ratios and proportions are. Harley Weston lui répond. 





A 3 dimensional 5 pointed star 
20011108 

Kent pose la question : I am looking for a formula that will give me a layout for a 3 dimensional 5 pointed star. I want to form it out of sheet metal, using 5 polygons and soldering them at the apex. Can you please help me with this? I would like to be able to give the formula the height of the star from the bottom two points to the top point and also how deep the star is. Thank you very much! Judi McDonald lui répond. 





Ratio and proportion 
20011010 

Steve pose la question : Where would you use a proportion and/or a ratio in a real life job or problem. Leeanne Boehm and Walter Whiteley lui répond. 





Percentage in our daily lives 
20011008 

Natasha pose la question : What are the uses of percentage in our daily lives? Leeanne Boehm lui répond. 





Quadratics 
20010516 

John pose la question : I am in the final stages of a math project and I need to interview an expert for the last part. Please try to answer at least a few of these questions.  How do you use quadratic equations in your everyday life?
 Do you find being a math expert very helpful in life?
 Is the quadratic equation useful to you?
 Why did you decide to become a math expert?
 What do you think is the most important function of the quadratic equation?
Harley Weston lui répond. 





The law of cosines in the real world 
20010221 

Hope pose la question : Do you have any examles and/or labs that show how the law of cosines is used in the real world? Harley Weston lui répond. 





Polynomials and exponents 
20010115 

A student pose la question : I am duing a project in math on polynomials and exponents. I need a real life usage of polynomials and exponents for my project. Penny Nom lui répond. 





The pythagorean theorem in everyday life 
20010106 

Josh pose la question : What are some ways that we use the pythagorean theorem in jobs, or even in everyday life? Claude tardif lui répond. 





Bridges and parabolas 
20001118 

Lauren pose la question : My name is Lauren, and Im a secondary school student in Ontario. For my gr11 advanced math class I have to find out how and why parabolics are used in arch bridges and write 3 paragraphs on it. People who cohse satelites and whatnot are lucky  I've found a ton of info, but for arch bridges there seems to be nothing. Harley Weston lui répond. 





Where will we use this in the real world? 
20001011 

Jane Ann Musgrove pose la question : As a teacher of mathematics, I am always asked "Where will we use this in the real world?". I am seeking ideas/sites via the internet where students can find answers to this type of question. Can you help me? To be more specific, right now I am interested in finding careers where the employees would use the concepts of "Radicals", "Matrices", and "Logarithms". This information will be used by students to make presentations to the class on their findings from internet searches. Harley Weston lui répond. 





A roll of paper 
20000115 

Richard pose la question : I have a roll of paper, wrapped around a corrugate core, whos diameter is 10.750 in. The outer diameter of the roll is approx. 60 in. The thickness of the paper is .014 in. I am trying to find out how much linear feet of paper is left on the roll, given only the diameter of paper remaining on the core. Chris Fisher and Harley Weston lui répond. 





Resources for realworld math activities 
19990326 

Kate O'Brien pose la question : Where is there a collection of math acitivities or projects to use in high school Algebra I, Algebra II, or Trigonometry that tie concepts to realworld careers? Jack LeSage lui répond. 





Fitting a Curve 
19990119 

Kirk Doward pose la question : Hello my name is Kirk from Scarborough, Ontario. I have been out of a formal education system for thirty years. I program microcontrollers in my spare time. I have built a temperature sensing device ready to go but, thermistors are very nonlinear. I do know that there is a way to calculate the input condition of the thermistor and display the correct temperature in degrees C. I am sending a file to show my progression so far. Harley Weston lui répond. 





What are fractals and are they of any practical use? 
19960626 

Ron Lewis pose la question : What are fractals and are they of any practical use? Chris Fisher lui répond. 





An application of Pythagoras' theorem 
19960409 

Mike Jones pose la question : We'd like to know what practical applications there may be for the Pythagorean theorem. Penny Nom and Maxine Stinka lui répond. 

