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Setting up a pool |
2016-04-09 |
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BETH pose la question :
i am trying to cover an area for a 15x15 foot round pool with play sand before I set up the pool. My playsand bag is 50 lbs , says it covers .5 cubic feet per bag. How many bags do I need?
Penny Nom lui répond. |
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Filling a hole with 14 tons of rock |
2016-04-08 |
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Barry pose la question :
If I had 14 tons of inch and one half sized aggregate rock, how large of a square or rectangular shaped hole would I need to hold that amount?
Penny Nom lui répond. |
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4 carpenters can build 8 houses in 10 days. |
2016-04-05 |
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Kenneth pose la question :
Hello:
Here is my question:
4 carpenters can build 8 houses in 10 days. 2 carpenters can build how many houses in 15 days?
Here is one solution:
The number of houses built is jointly proportional to the number of carpenters and the number of days. So h = kcd where k is a constant. Substituting the given: 8 = k*40, so k = 1/5. Our formula is then h = cd/5. I'm not sure how to determine whether or not one unit is jointly proportional to any other unit.
However, if 2 carpenters are unknown as in 4 carpenters can build 8 houses in 10 days. How many carpenters can build 6 houses in 15 days? What is the solution using this method? And likewise, if days are unknown, as in 4 carpenters can build 8 houses in 10 days. 2 carpenters can build 6 houses in how many days?
I thank you for your assistance.
Penny Nom lui répond. |
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Pizza delivery |
2016-04-03 |
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Andrew pose la question :
Suppose you own a local pizza restaurant, Pizza with Pizzazz, and in order to compete with the big pizza chains in your area you are considering an advertising campaign offering customers a free pizza if their pizza is not delivered in 30 minutes or less. Even though your pizza restaurant is known for its fast and friendly delivery service, you are not sure if you can afford to give away too many pizzas for free. Looking over your past 12,421 pizza deliveries you find out 97% of the pizzas were delivered in 30 minutes or less.
Calculate the probability that all 100 randomly selected pizza deliveries will have been made in 30 minutes or less? Hint: Use the multiplication rule. (Round 4 decimals)
I'm really stumped on how exactly to do this problem. I don't need the answer just the steps broken down to show me how to get it!
It would be gladly appreciated if you could help!
Penny Nom lui répond. |
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Maximizing the area of a two lot region |
2016-04-03 |
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yousef pose la question :
A man wishes to enclose two separate lots with 300m of fencing. One lot is a square and the other a rectangle whose length is twice its width. Find the dimensions of each lot if the total area is to be a minimum.
Penny Nom lui répond. |
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The last two digits of a phone number |
2016-04-03 |
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Joshua pose la question :
I want to find the last two digits of a phone number whose first eight numbers of a ten digit phone numbers are known.
Penny Nom lui répond. |
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20 mangoes |
2016-04-01 |
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Mussharat pose la question :
I have 20 mangoes and have to put them in 5 boxes such that
the numbers will be odd numbers.Also I can't cut or take the seed
out from the mango . What should I do. It's really confusing.
I'll be more than happy if you could help me.
Penny Nom lui répond. |
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The volume of a cone |
2016-03-31 |
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Odum pose la question :
Find the volume of a cone with radius 6.5cm and height 12.6cm
Penny Nom lui répond. |
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When does sqrt(x^2+y^2)=x+y? |
2016-03-30 |
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Margret pose la question :
when does sqrt(x^2+y^2)=x+y
Penny Nom lui répond. |
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A tilted cylinder tank |
2016-03-28 |
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Astri pose la question :
I have a problem determining the fluid level for tilted cylinder tank.
Actually I've found some solution here for horizontal cylinder tank. What if the cylinder
is tilted at a certain degree, for example 30 degree from the vertical axis.
Thank you.
Penny Nom lui répond. |
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The remainder theorem |
2016-03-27 |
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Pratyasha pose la question :
A quadratic polynomial when divide by x+2 leaves a remainder of 1 and when divided by x-1 leaves a remainder of 4. What will be the remainder if it is divided by (x+2)(x-1)?
Penny Nom lui répond. |
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The volume of a box with a hexagonal base |
2016-03-27 |
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Frank pose la question :
how many gallons of water in an 8" hexagon shaped box. 6" sides x 12.5" high ? The walls are 1" thick , beveled @ 30 degrees, so inside dimensions are 6"
Penny Nom lui répond. |
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A square based box and a cylinder |
2016-03-26 |
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rajpal pose la question :
i m trying to calculate an area required to hold 4.4 mln cubic metres of volume.
I used square and I get below result
A box shape that has dimensions 1500 meters (1.5km) by 1500 meters (1.5km) by 2 meters depth has a volume of:
= 4,500,000 cubic meters (4.5 mln cubic meters)
but when I use a cylinder shape, i get below result
A cylindrical shape that has a radius of 850 meters and a depth of 2 meters has a volume of:
= 4,539,600 cubic meters (4.54 mln cubic meters approx)
why is it that the cylinder, though of same depth holds more volume than a square?
kindly clarify.
Penny Nom lui répond. |
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An isosceles triangle inscribed in a circle |
2016-03-25 |
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NIHAL pose la question :
A isosceles triangle is inscribed in a circle having sides 20cm,20cm,30cm. find the radius of circle
Penny Nom lui répond. |
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Polynomial division |
2016-03-25 |
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Ashley pose la question :
(4x-4+6x^3-x^2)/(3x-2)
The instructions say to "perform the division".
Penny Nom lui répond. |
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