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Some angles in a pyramid |
2008-08-04 |
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Carla pose la question : 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. Penny Nom lui répond. |
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Find the product of 2^35 and 5^38 in sci. notation. |
2008-08-03 |
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Peter pose la question : 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? Penny Nom lui répond. |
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A cubic mile of water |
2008-08-03 |
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Fred pose la question : [QQ] HOW MUCH WATER IS THERE IN A CUBIC MILE? Stephen La Rocque lui répond. |
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The best time to teach math |
2008-08-03 |
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Kelli pose la question : Is there a best time to teach math in the elementary classroom? Has anyone done any research about this? Stephen La Rocque lui répond. |
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Non-terminating, non-repeating decimals |
2008-08-03 |
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Peter pose la question : How do you take a random, non-terminating, non-repeating decimal into a fraction? Stephen La Rocque lui répond. |
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The volume of a fuel tank |
2008-08-01 |
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G. pose la question : I have a fuel tank that is 70 inches by 48 inches and 24 inches deep, how many imperial gallons does it hold? Victoria West lui répond. |
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Two equations in two unknowns |
2008-08-01 |
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James pose la question : 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? Victoria West lui répond. |
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Number Combinations |
2008-08-01 |
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cary pose la question : 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? Janice Cotcher lui répond. |
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Product of Two-Digit Numbers |
2008-07-31 |
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pete pose la question : The number 4641 can be expressed as the product of two two-digit whole numbers. What is the sum of these two numbers? Janice Cotcher lui répond. |
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Area of triangle formed by three tangent circles |
2008-07-31 |
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brian pose la question : 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? Stephen La Rocque lui répond. |
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algebra |
2008-07-31 |
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Eric pose la question : Would you please solve & explain this equation to me: x^2+2x=x(x+2)?
Thank you Penny Nom & Stephen La Rocque lui répond. |
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Width of a Garden Path |
2008-07-30 |
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Erin pose la question : 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? Janice Cotcher lui répond. |
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Finding Angles in a Pyramid |
2008-07-30 |
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Carla pose la question : 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. Janice Cotcher lui répond. |
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Inscribed Rectangle |
2008-07-30 |
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Felicia pose la question : A rectangle whose base is twice its altitude is inscribed in a circle whose radius is 5 mm.
Find the area of the rectangle. Penny Nom lui répond. |
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Lot size of a four sided lot |
2008-07-30 |
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JAMES pose la question : 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 Penny Nom lui répond. |
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