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Price of topsoil |
2007-02-02 |
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From Tyler:
I need to convert cubic yards to square feet. I have topsoil that is $34.30 a cubic yard and I need to know what the price is in square feet. The depth is 18".
Answered by Penny Nom. |
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Derivatives |
2007-02-01 |
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From Jacob:
Find the derivative of: y= pi^2+x^2+3xy+sin(y^2)
Answered by Penny Nom. |
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Fencing a field |
2007-02-01 |
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From Carol:
"The area of a rectangular field is 1200m^2. Two parallel sides are fenced with aluminum at $20/m. The remaining two sides are fenced with steel at $10/m. The total cost of the fencing is $2200." What is the length of each side fenced with aluminum and steel?
Answered by Stephen La Rocque. |
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A margin of 19% |
2007-02-01 |
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From Ed:
I PAY $10.95 FOR THIS PRODUCT, HOW SHOULD I PRICE IT IN ORDER TO HAVE A MARGIN OF 19% COST.
Answered by Penny Nom. |
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Rectangles and squares |
2007-01-31 |
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From Shelby:
I am doing homework and I need to know why squares are rectangles but not all rectangles are squares?
Answered by Penny Nom. |
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Angle of clock hands |
2007-01-31 |
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From Sophia:
How many degrees are in the aute angle formed by the hands of a clock at 2:20 p.m.?
Answered by Stephen La Rocque. |
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The perimeter and area of a right angled triangle |
2007-01-31 |
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From Naveen:
I need to calculate the area of a right angled triangle. However the measurements of the 3 sides is missing. All we are told is that the perimeter of the triangle is 1000cm.
Answered by Penny Nom. |
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The volume of a cone |
2007-01-31 |
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From ajay:
WHY VOLUME OF CONE IS ONE THIRD OF THE VOLUME OF CYLINDER?
Answered by Penny Nom. |
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The cube root of 8000 |
2007-01-31 |
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From Jacqui:
How would you find the answer of a cube root backwards. For example: 8000 but backwards. Like, what number made that and how would you do it?
Answered by Penny Nom. |
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The substitution method |
2007-01-31 |
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From Victoria:
how do i solve this problem using the substitution method?
2x-5= -14
-7x+14y= -5
Answered by Stephen La Rocque. |
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The elimination method |
2007-01-31 |
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From Addrianna:
x-2y=2
3x-5y=7
Answered by Stephen La Rocque. |
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The units digit of 9^2006 + 3^2006 |
2007-01-30 |
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From Ryan:
What is the units digit of the sum of 9^2006 and 3^2006
Answered by Penny Nom. |
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Water in a triangular trough |
2007-01-30 |
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From Trina:
the trough is 5 feet long and its vertical cross sections are inverted isosceles triangles with base 2 feet and height 3 feet. water is draining out of the trough at a rate of 2 cubic feet per minute. at any time t, let h be the depth and v be the volume of water in the trough.
a. find the volume of water in the trough when it is full
b. what is the rate of change in h at the instant when the trough is .25 full by volume?
c. what is the rate of change in the area of the surface of the water at the instant when the trough is .25 full by volume?
Answered by Penny Nom. |
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The density of an irregular wooden block |
2007-01-30 |
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From Carlos:
I'm trying to help my son but I don't really have too much knowledge about this topic. he is been asked to convert 10 milliliter to gram, I think that since 1 g = 1ml the answer will be 10 g also there is another question of how of the density of an irregular wooden block is affected if:
a) the center is hollow:
b) the block is not completely submerged when determining the volume.
Answered by Stephen La Rocque and Penny Nom. |
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Simplify 18e^2fg/32eg^2 |
2007-01-30 |
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From Morgan:
how do you simplify 18e^2fg/32eg^2
Answered by Penny Nom. |
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