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A circular blob of molasses |
2007-05-28 |
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Julie pose la question :
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
Penny Nom lui répond. |
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I want to divide my land |
2007-05-27 |
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alfredo pose la question :
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
Penny Nom lui répond. |
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The surface area of a fire hose |
2007-05-26 |
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Vanessa pose la question :
Why do we need to find the surface area of a fire hose (cylinder).
Stephen La Rocque lui répond. |
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More on quadrilateral shape names |
2007-05-26 |
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Don pose la question :
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?
Walter Whiteley and Penny Nom lui répond. |
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What are the odds that the selections were random? |
2007-05-26 |
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alan pose la question :
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?
Penny Nom lui répond. |
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The circumference of an ellipse |
2007-05-25 |
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Graham pose la question :
I have an ellipse that I need to find the circumference of. It is 40ft at its longest point and 25ft at its shortest
Penny Nom lui répond. |
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Discovering the incircle of an irregular polygon |
2007-05-25 |
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Joaquim pose la question :
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?
Walter Whiteley lui répond. |
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Area of a hexagon (three ways to find it) |
2007-05-24 |
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Josh pose la question :
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.
Stephen La Rocque lui répond. |
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Is a square also a right trapezoid? |
2007-05-24 |
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Don pose la question :
Is a square also a right trapezoid?
Stephen La Rocque lui répond. |
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Volume of a chest |
2007-05-24 |
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Jerry pose la question :
Heighth: 28" Width: 32" Depth: 20"
Stephen La Rocque lui répond. |
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Simplifying a square root |
2007-05-24 |
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Leigh pose la question :
I am trying to help my son. Simplify sq root 81 x to the 2nd power y to the 12th power.
Stephen La Rocque lui répond. |
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How to increase your average |
2007-05-24 |
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Janna pose la question :
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?
Penny Nom lui répond. |
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System of equations |
2007-05-24 |
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Chris pose la question :
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
Penny Nom lui répond. |
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Normal distribution |
2007-05-24 |
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Paula pose la question :
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.
Penny Nom lui répond. |
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Solve for I |
2007-05-23 |
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Mark pose la question :
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
Stephen La Rocque lui répond. |
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