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A circular blob of molasses |
2007-05-28 |
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From Julie:
A circular blob of molasses of uniform thickness has a volume of 1 m^3.
The thickness of the molasses is decreasing at a rate of 0.1 cm/hour.
At what rate is the radius of the molasses increasing when the radius is 8
m?
Thanks,
Julia
Answered by Penny Nom. |
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I want to divide my land |
2007-05-27 |
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From alfredo:
i want to divide my land. It is north is 11.86 ft, the S is 110.00 ft, the W is 644.34 ft the E is 644.58 ft. which =to1.606 acre. how many feet going from N to S would it be to make 1.5 acre
Answered by Penny Nom. |
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The surface area of a fire hose |
2007-05-26 |
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From Vanessa:
Why do we need to find the surface area of a fire hose (cylinder).
Answered by Stephen La Rocque. |
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More on quadrilateral shape names |
2007-05-26 |
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From Don:
If North Americans call a quadrilateral with no parallel sides a trapezium, is a kite merely a special type of trapezium? Can a rhombus be a kite?
Answered by Walter Whiteley and Penny Nom. |
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What are the odds that the selections were random? |
2007-05-26 |
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From alan:
An employer must select three people for layoff from three groups. Group 1 has 4 members and the oldest member is selected. Group 2 has 7 members and the oldest member is selected. Group 3 has 2 members and the younger is selected. Assuming equal qualifications, what are the odds that the selections were random vs. biased as to age? What is the formula to determine this?
Answered by Penny Nom. |
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The circumference of an ellipse |
2007-05-25 |
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From Graham:
I have an ellipse that I need to find the circumference of. It is 40ft at its longest point and 25ft at its shortest
Answered by Penny Nom. |
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Discovering the incircle of an irregular polygon |
2007-05-25 |
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From Joaquim:
I've been searching in some books and many websites, but I couldn't find a formula or algorithm for discovering the incircle of an irregular polygon, could you please help me?
Answered by Walter Whiteley. |
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Area of a hexagon (three ways to find it) |
2007-05-24 |
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From Josh:
I have to work out the area of a hexagon when I know that the perimeter
of it is 1000m. I have tried many different ways but I get different
answers.
Answered by Stephen La Rocque. |
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Is a square also a right trapezoid? |
2007-05-24 |
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From Don:
Is a square also a right trapezoid?
Answered by Stephen La Rocque. |
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Volume of a chest |
2007-05-24 |
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From Jerry:
Heighth: 28" Width: 32" Depth: 20"
Answered by Stephen La Rocque. |
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Simplifying a square root |
2007-05-24 |
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From Leigh:
I am trying to help my son. Simplify sq root 81 x to the 2nd power y to the 12th power.
Answered by Stephen La Rocque. |
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How to increase your average |
2007-05-24 |
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From Janna:
after taking 4 quizes your average is 71 out of 100. what must your average
on the next 5 quizes be to increase your average to an 81 out of 100?
Answered by Penny Nom. |
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System of equations |
2007-05-24 |
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From Chris:
Find all real solutions (x,y,z,w) of the system of equations:
2y= x + x/17, 2z= y + y/17, 2w = z + z/17, 2x= w + w/17
Answered by Penny Nom. |
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Normal distribution |
2007-05-24 |
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From Paula:
Consider a data set that is normally distributed.
The mean of the data set is equal to 10,000.
a.) Suppose that, for this data set, 10,625 has a
"z-value" = 2.5. Solve for the standard deviation of
the data set.
b.) Solve for the "z-value" of 9,900.
Answered by Penny Nom. |
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Solve for I |
2007-05-23 |
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From Mark:
A=4.9(B)*C^(.00925(D-.542))* E^(-.015(D))*E^(-.013(F))* (G/B)^(-.00825(D-.225))* H^-.877*(I/B)^.511*(J/B)^.319
Answered by Stephen La Rocque. |
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