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Some angles in a pyramid |
2008-08-04 |
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From Carla:
A symmetrical pyramid stands on a square base of side 8cm. The slant height of
the pyramidis 20cm. Find the angle between the slant edge and the base, and the angle between
a slant face and the base.
Answered by Penny Nom. |
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Find the product of 2^35 and 5^38 in sci. notation. |
2008-08-03 |
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From Peter:
I am preparing for a competition and a lot of the non-calculator problems are like find the product of 2^35 and 5^38 in sci. notation. How would you do that?
Answered by Penny Nom. |
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A cubic mile of water |
2008-08-03 |
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From Fred:
[QQ] HOW MUCH WATER IS THERE IN A CUBIC MILE?
Answered by Stephen La Rocque. |
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The best time to teach math |
2008-08-03 |
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From Kelli:
Is there a best time to teach math in the elementary classroom? Has anyone done any research about this?
Answered by Stephen La Rocque. |
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Non-terminating, non-repeating decimals |
2008-08-03 |
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From Peter:
How do you take a random, non-terminating, non-repeating decimal into a fraction?
Answered by Stephen La Rocque. |
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The volume of a fuel tank |
2008-08-01 |
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From G.:
I have a fuel tank that is 70 inches by 48 inches and 24 inches deep, how many imperial gallons does it hold?
Answered by Victoria West. |
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Two equations in two unknowns |
2008-08-01 |
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From James:
Question from james, a student:
3x+2y=9;24x-2y=18
My math teacher says that it is (2,-4)
Can someone please explain how to figure this out by graphing?
Answered by Victoria West. |
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Number Combinations |
2008-08-01 |
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From cary:
I need a list of all possible 5 digit number combinations from 1 to 20 and no repeats. and a formula of how to calculate this would also be helpful?
Answered by Janice Cotcher. |
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Product of Two-Digit Numbers |
2008-07-31 |
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From pete:
The number 4641 can be expressed as the product of two two-digit whole numbers. What is the sum of these two numbers?
Answered by Janice Cotcher. |
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Area of triangle formed by three tangent circles |
2008-07-31 |
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From brian:
Three circles with radii 3,4 and 5 touch each other. The circles are tangent to each other. What is the area of the triangle formed by the centers of the circles?
Answered by Stephen La Rocque. |
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algebra |
2008-07-31 |
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From Eric:
Would you please solve & explain this equation to me: x^2+2x=x(x+2)?
Thank you
Answered by Penny Nom & Stephen La Rocque. |
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Width of a Garden Path |
2008-07-30 |
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From Erin:
A rectangular garden has dimensions of 18 feet by 13 feet. A gravel path of uniform width is to be built around the garden. How wide can the path be if there is enough gravel for 516 square feet?
Answered by Janice Cotcher. |
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Finding Angles in a Pyramid |
2008-07-30 |
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From Carla:
A pyramid has its vertex directly above the centre of its square base. The edges of the base
are each 8cm, and the vertical height is 10cm. Find the angle between the slant face and the base,
and the angle between the slant edge and the base.
Answered by Janice Cotcher. |
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Inscribed Rectangle |
2008-07-30 |
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From Felicia:
A rectangle whose base is twice its altitude is inscribed in a circle whose radius is 5 mm.
Find the area of the rectangle.
Answered by Penny Nom. |
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Lot size of a four sided lot |
2008-07-30 |
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From JAMES:
I'm trying to find out this lot
size in acres.
I looked at a bunch of your suggestions, but I guess
I'm not smart enough
to figure it out.. I have attached an image of the
lot, hopefully with
enough info. for you..
Thanks,
Jim
Answered by Penny Nom. |
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