 |
|
|
|
|
|
|
|
|
Three numbers are added in pairs |
2004-02-12 |
|
From Jane:
When three numbers are added in pairs, the sums of the pairs are 22, 39, and 45. What are the three numbers?
Answered by Penny Nom. |
|
|
|
|
|
|
Driving from Sarnia |
2004-02-11 |
|
From Jane:
"Crystal drove from Sarnia at 80km/hr. Emily left Sarnia one hour later and drove along the same road at 100km/hr. How far from Sarnia did Emily overtake Crystal?"
Answered by Claude Tardif. |
|
|
|
|
|
|
Digits in the decimal expansion |
2004-02-11 |
|
From Leslie:
In the decimal expansion of 1/17 what digit is in the 1997th place?
Answered by Penny Nom. |
|
|
|
|
|
|
Sums and differences |
2004-02-10 |
|
From David:
The sum of two whole numbers is 63. The difference between the numbers is 10. Find all the possible pairs.
Answered by Claude Tardif and Penny Nom. |
|
|
|
|
|
|
Three times a year |
2004-02-09 |
|
From Graham:
What is the term for a report that is submitted three time a year or at the very least a prefix term for one third
Answered by Harley Weston. |
|
|
|
|
|
|
Will be shinning in 36 hours? |
2004-02-08 |
|
From Kim:
It is noon, you lunch hour, but you cannot go out because there is a terrific hailstorm. Turning on you radio you hear that weathercaster predicts that the hail will change to rain and that it will pour all day today. How can you determine whether the sun will be shinning in 36 hours? Justify your answer.
Answered by Penny Nom. |
|
|
|
|
|
|
Graphing lines |
2004-02-08 |
|
From A student:
how do you solve y=1\3x+3 and y=1\3x-3 by graphing?
Answered by Penny Nom. |
|
|
|
|
|
|
A/30 + B/105 = (7A + 2B)/x |
2004-02-05 |
|
From Jim:
If A/30 + B/105 = (7A + 2B)/x and A, B, and x are integers greater than 1, what must x equal?
Answered by Penny Nom. |
|
|
|
|
|
|
A quadratic word problem |
2004-02-04 |
|
From Carl:
A walkway of uniform has 72m2 and surrounds a swimming pool that is 8m wide and 10m long. Find the width of the walkway.
Answered by Penny Nom. |
|
|
|
|
|
|
$20,000 at 25% compounded daily |
2004-02-03 |
|
From A student:
Hi there, I'm tying to figure out how much interest I would pay on 20,000 if it was 25% compounded daily.
Answered by Penny Nom. |
|
|
|
|
|
|
Geometric sequences |
2004-02-03 |
|
From Alan:
hello, I am a junior in precalculus. we started working on geometric sequences today, it makes perfect sense on how it works. but why is it called that? if you could send me an answer to why geometric sequences have that name, I would be much appreciative.
Answered by Chris Fisher. |
|
|
|
|
|
|
The volume of a tetrahedron |
2004-02-03 |
|
From Joseph:
How do I calculate the volume of a bird tetrahedron. I'm trying to find out to get extra credit. I came with this idea while making a origami tetrahedron.
Joseph
P.S. Do you by any chance have instructions for orig ami figures. If you do, please send me some. Thanks!
Answered by Penny Nom. |
|
|
|
|
|
|
The incline of an exercise machine |
2004-02-02 |
|
From An exerciser:
This is a question about incline percentage. On an exercise machine if the elevation is raised 3 and one half inches from a level position then what would be the incline percentage?
Answered by Penny Nom. |
|
|
|
|
|
|
Angular speed |
2004-02-01 |
|
From Rachel:
A 4 inch pulley on a motor makes 1500 revolutions/minute. It is connected to an 8 inch saw blade.
a. Find the angular speed of the pulley in radians/minute
b. Find the angular speed of the saw in radians/ minute
Answered by Harley Weston. |
|
|
|
|
|
|
Logarithms |
2004-02-01 |
|
From A student:
Where did the word logarithmic come from? Where/whom did it originate?
Answered by Harley Weston. |
|
|
