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The weight of a bar of steel |
2008-04-22 |
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From Himmler:
if a steel weighs 0.30 pounds per cubic inch, then the weight of a 2 inch square steel bar 90 inches long is------------pounds.
Answered by Penny Nom. |
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How is the square root of 3/4 is greater than 3/4? |
2008-04-22 |
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From Serena:
How is the square root of 3/4 is greater than 3/4?
Answered by Penny Nom. |
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Why does -2^2 = -4 when -2 * -2 = 4? |
2008-04-22 |
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From blaine:
Why does -2^2 = -4 when -2 * -2 = 4?
Answered by Penny Nom. |
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What is the integral of 13sin^3(x)*cos^7(x)dx? |
2008-04-22 |
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From Cathrine:
I am having trouble integrating this problem. It says to evaluate the integral but I don't know what to do or how to do it.
It is the integral of
13sin^3(x)*cos^7(x)d
Answered by Harley Weston. |
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Find the quadratic equation with roots at (3-i) and its complex conjugate |
2008-04-22 |
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From Tiffany:
Find the quadratic equation with roots at (3-i) and its complex conjugate.
Answered by Penny Nom. |
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The isoperimetric inequality |
2008-04-21 |
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From Dutch:
I'm searching for the proof that the sphere has the smallest volume of any figure and maximizes the volume of any figure.
Answered by Chris Fisher. |
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f(x)=sin^3(3x^2) find f ' (x) |
2008-04-21 |
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From Michael:
f(x)=sin^3(3x^2) find f ' (x)
Answered by Harley Weston. |
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The perimeter of a half acre square |
2008-04-20 |
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From s:
Measured in feet. What would be the perimeter of a square area of land measuring
1/2 acre?
Answered by Penny Nom. |
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Why can't a square be twice another square? |
2008-04-20 |
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From kim:
why can't a square number double another one
Answered by Penny Nom. |
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The sum of the ages of Petra and her mother is 45 |
2008-04-20 |
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From Wendy:
The sum of the ages of Petra and her mother is 45. Her mother is 12 years more than twice as old as Petra. How old are Petra and her mother?
Answered by Leeanne Boehm. |
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Ratios and fractions |
2008-04-20 |
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From Alissa:
What is the formula for writing the ration of two numbers as a fraction?
Answered by Leeanne Boehm. |
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x/3 -5 = 3(x-2) |
2008-04-20 |
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From Mrs:
I am having trouble helping my son solve the following equation:
x/3 -5 = 3(x-2)
Answered by Penny Nom. |
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What is the % of the resulting solution? |
2008-04-20 |
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From RON:
USING 4 PARTS OF 80% SOLN AND 1 PART OF 20% SOLN, WHAT
IS THE % OF THE RESULTING SOLN? FOR 120ML USE 96 ML OF
THE 80% SOLN AND 24 ML OF THE 20% SOLN BUT WHAT IS
THE % OF THE RESULTING SOLN? PLEASE SEND HOW TO
CALCULATE THE %. IS THE ANSWER 68% ??
Answered by Penny Nom. |
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A water alcohol mixture |
2008-04-20 |
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From Mary:
How many oz. of solution that is 90% alcohol ( and 10% water) is needed to be mixed with 5 ounces of a solution that is 50% alcohol in order to obtain a solution that is 80% alcohol?
Answered by Penny Nom. |
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The dimensions of a rectangle |
2008-04-20 |
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From Brandy:
Find the dimensions of a rectangle with a primeter of 54 cm if the length is 5 less than three times the width.
Answered by Penny Nom. |
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