|
|
|
|
|
|
|
|
Even-numbered roots |
2004-03-01 |
|
A student pose la question : I understand that the square root is defined to be positive only. Does
the same rule apply to other even-numbered roots, such as the 4th root, or
the 6th root, etc.? Harley Weston lui répond. |
|
|
|
|
|
Logs |
2004-02-29 |
|
Sandy pose la question : find X
3/2logb4-1/2logb8+logb2=logbx
my book uses prop 7 to rewrite as
logb4raised3/2-logb8raised2/3+logb2=logbx; then writes
logb8-logb4+logb2=logbx how did it get here? Claude Tardif lui répond. |
|
|
|
|
|
A dress-maker's pattern |
2004-02-27 |
|
A dress-maker pose la question : Does a dress-maker's pattern for a dress, such as a skirt made up of several pieces of isosceles trapezoid, qualify as a net? How about patterns for other types of clothing or accessories e.g. jackets, handbags?Î Diane Hanson lui répond. |
|
|
|
|
|
Napoleon's theorem |
2004-02-27 |
|
David pose la question : How do i prove this : For any triangle, if you make 3 equillateral triangles
using the sides of the the original triangle, the central points of the 3
tringles another triangle that is equillateral.z Chris Fisher and Penny Nom lui répond. |
|
|
|
|
|
GST and PST |
2004-02-26 |
|
Mallory pose la question : I was absent on the day that my teacher taught the class how to find the GST and PST of items. I sort of understand that GST is 7% and PST is 7.5%, but our teacher said that we shouldn't combine the two to find the total amount... I'm really confused, so can you please help me?& Claude Tardif lui répond. |
|
|
|
|
|
Three jugs |
2004-02-26 |
|
Shelly pose la question : You have three jugs: A 6 Liter, 4 Liter and a 3 Liter. Your goal is to get exactly 5 Liters of liquid in the 6 Liter jug. Your supply of liquid is unlimited and there are NO markings on the containers. You cannot do halves. Claude Tardif lui répond. |
|
|
|
|
|
The point where all the medians meet |
2004-02-25 |
|
A student pose la question : What's the name of the point where all the medians meet? Penny Nom lui répond. |
|
|
|
|
|
Rearranging an expression |
2004-02-24 |
|
Corey pose la question :
use the following formula to answer the question
F=9c divided by 5 plus 32
rearange the formula to solve for c
how many degrees fahrenheit would it be it it was:
0 degrees celcius
-10 degrees celcius
-46 degrees celcius
Penny Nom lui répond. |
|
|
|
|
|
An elliptic cone |
2004-02-24 |
|
Ben pose la question :
I am building a model for my architecture class. I need to build a elliptic cone out of chipboard and i have no idea how to do this.
The cone needs to be 20in tall and the ellipse has a max radius of 10in and a min radius of 8in.
So my question is how do i lay this out on a piece of paper so that i can form the cone after i cut it out.
Penny Nom lui répond. |
|
|
|
|
|
Profit, markup and discount |
2004-02-22 |
|
Kick pose la question : Using the calculation on your website, if I sell something for $885 and my cost is $296, I make $589 profit. How do I calculate the profit percent I made on that transaction?
Profit as a percentage of what it cost me?
Profit as a percentage of what I sold it for?
Penny Nom lui répond. |
|
|
|
|
|
A problem with logs |
2004-02-22 |
|
Caitlyn pose la question : problem: ln x + ln (x-2) = 1
I can solve this on the calculator, but the book wants 1+ [(sqroot)1+e]. How can I get the e? Penny Nom lui répond. |
|
|
|
|
|
Selecting balls from a golf bag |
2004-02-21 |
|
A student pose la question : There are 5 white and 5 yellow balls in a golf bag. Two are selected randomly, and simultaneously. What is the probability that the first one or the second one will be white? Penny Nom lui répond. |
|
|
|
|
|
The dimensions of a rectangle |
2004-02-21 |
|
Jane pose la question : A rectangular label has an area of 176cm2 and a perimeter of 54cm. Find the dimensions of the label. Penny Nom lui répond. |
|
|
|
|
|
Gallons in a cylinder |
2004-02-20 |
|
Jim pose la question : Please advise how to use the formula I saw for determining the number of gallons in a cylinder? This is how it was written
V = pi r2 h
. does this mean pie, or 3.14 X radius squared, X the height? If so please use a standard 55 gal barrel (1' R & 3' H) for example? Penny Nom lui répond. |
|
|
|
|
|
Arrays |
2004-02-19 |
|
A parent pose la question : please demonstrate mathematical arrays fro a 3rd grader Penny Nom lui répond. |
|
|