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Four questions |
2000-03-17 |
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From Ibrahim Bin kasmin:
- What is a hexahedron?(please show a picture of a hexahedron).
- How do we make a cube out of three pyramids?(show me the picture).
- How do we find the approximate perimeter and area of a hibiscus leaf?
- What is a Pascal triangle?
Answered by Penny Nom. |
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The Kennedy Pep Club |
2000-03-17 |
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From David Grimmer:
The Kennedy Pep Club rented a bus to take all of its members to a baseball game. The cost per person was to be $18.00. However, those making the trip had to pay $24.00 each because 10 members cancelled at the last minute. How many pep club members took the bus to the game?
Answered by Penny Nom. |
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Completing a sequence |
2000-03-17 |
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From David Grimmer:
Complete the following sequence so that, after the first two terms, each successive term is the average of all the preceding terms. 20__ __ 28 __ __
Answered by Penny Nom. |
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1000 percent |
2000-03-17 |
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From Matt Stevenson:
If one invests $4000.00 and makes 1000% on the investment would he/she have $40,000.00?
Could one figure this by: $4000.00 * 10.0 = $40,000.00?
So is 10 times a number the same as 1000%? Would 100 times a number be the same as 10,000%?
Answered by Penny Nom. |
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Division |
2000-03-16 |
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From Charday:
What is the easiest way to calculate the least number that can be divided evenly by all the numbers from 1 to 10.
Answered by Penny Nom. |
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Induction |
2000-03-16 |
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From William Tsang:
I am trying to prove a induction question Sigam r=1 n (2r -1)cube = n square (2 n square - 1)
Answered by Harley Weston. |
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Functions that satisfy f' = f |
2000-03-16 |
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From Kevin Palmer :
Recently my calculus teacher asked his students to try and find any functions whose derivatives where the exact same as the original function. The only function then I have determined that statement to be accurate in is all the natural exponential functions. Ex. f(x) = ex, f'(x) = ex If possible could you please email me all the functions that you can find in which the original function and its derivative is identical.
Answered by Claude Tardif. |
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Putting in a pool |
2000-03-16 |
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From Katie:
If your digging a hole for a pool and the pool is: Length= 11m
Width= 6m
Sallow Depth= 1.1m graduating to
'Deep' Depth= 1.8m What is the volume of soil that will be taken out? And if a bobcat can excavate and remove 10m3 (qubed) of soil an hour how long will it take him to excavate the soil.
Answered by Penny Nom. |
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Geometrical solids |
2000-03-15 |
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From Sarah:
- What geometrical solid has 8 edges and 5 vertices?
- What geometrical solid has 12 edges that are all the same length?
Answered by Walter Whiteley. |
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Rationals, irrationals and integers |
2000-03-14 |
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From Erin McKeon:
Why does the letter J represent the set of integers, the letter Q represent a set of rational numbers and the letter P represent a set of irrational numbers? What do each of these letters stand for?
Answered by Harley Weston. |
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Eligibility in a contest |
2000-03-14 |
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From Ken Rabley:
Hi, hoping you can help. Dispute among co-workers. Tell me, what is the correct answer to the following question: -1936 + (2406/4812) x (4756 - 3256) + 1250 Seems this is the question for eligibility in a contest...We have come up with various solutions, all which may be correct.
Answered by Penny Nom. |
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Characteristic of a logarithm |
2000-03-14 |
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From Andrew Strauss:
What is the characteristic of log base 18 of 1980 ?
Answered by Harley Weston. |
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Two problems |
2000-03-14 |
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From Teresa Bostic :
- A man's age at death was 1/29 of the year of his birth. How old was he in 1949?
- At a contest, 2 persons were asked their ages. Then to test their ability mathematically, they were asked to give the ages together. One gave 44 and the other gave 1280. The first had subtracted one age from another, and the second had multiplied the two together. What were their ages?
Answered by Penny Nom. |
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An integer max-min problem |
2000-03-13 |
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From Paul Servic:
Maximize Q = xy 2 where x and y are positive integers such that x + y 2 = 4
Answered by Penny Nom. |
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A trogonometry problem |
2000-03-12 |
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From A student:
Find all values of X in the interval 0 degrees <= x < 360 degrees that satisfy the equation 2sin x - cos 2x = 0.
Answered by Harley Weston. |
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