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Irrigation and a sector of a circle |
2004-12-23 |
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Chuck pose la question :
A friend of mine is a farmer and uses Pivots to irrigate portions of his land. The crop rows are in straight lines that all form chords of a large circle. The intent is to determine area between any two "boundary" rows expressed in acres.
Harley Weston lui répond. |
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252 x ? is a cube |
2004-12-22 |
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Andrea pose la question :
What is the smallest positive interger by which 252 can be multipled so the result is a perfect cubed?
Penny Nom lui répond. |
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Making the number 99999 |
2004-12-22 |
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Lisa pose la question :
Make as many equations as possible to make the number 99999 using all of the numbers 0-9 but only once per equation. example 01234 + 98765 = 99999 she needs to make 150+ equations.
Paul Betts lui répond. |
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A Reuleaux triangle |
2004-12-22 |
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Bob pose la question :
I am trying to remember the name given to the regular figure constructed from three arcs. The figure is like an equilateral triangle except with arcs for each side.
Chri Fisher lui répond. |
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-1 exposant 4 |
2004-12-19 |
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Denis pose la question :
ma question est : -1 exposant 4 = ? Quand nous avons une base négative sans parenthèse comme ma question
Diane Hanson lui répond. |
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Divisibility by 15 |
2004-12-19 |
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Lisa pose la question :
My son was asked to find divisiblity rules for 15. We have been unable to find the answer. Does it exist?
Leeanne Boehm and Denis Hanson lui répond. |
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The gradiant of a hill is 9% |
2004-12-18 |
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Jim pose la question :
The gradiant of a hill is 9%. What angle is created by the run/rise of the hill and 0 degrees?
Penny Nom lui répond. |
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Two intersecting lines |
2004-12-18 |
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James pose la question :
Imagine a vertical line 1.107' tall. Leaving the top of this line, sloping down to the right at a 4:1, at what horizontal distance will the line strike a second line, which leaves the the bottom of the vertical line sloping down to the right at a rate of .02 ft/ft (or 2%)? There is a fairly easy solution to this, but I have lost my notes!
Harley Weston lui répond. |
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A two equation fact family |
2004-12-17 |
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Tony and Hailey pose la question :
My Daughter Hailey had this question as part of her 4th grade math homework. Name 2 fact families that have only two equations. For the life of me I can't figure it out. Any ideas?
Penny Nom lui répond. |
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0.999..., asymptotes and infinity |
2004-12-17 |
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Mike pose la question :
My Name is Mike and I teach high school. I had a student ask me to explain why .9 repeating is equal to 1. Then he asked me about an asymptote, or why a parabola or any other curve for that matter can continually approach a value (like 1) and yet never attain a value of 1. He is thinking that these two should represent the same concept and yet they contradict each other. Do you have a solid explanation for him? Of by the way he is a 7th grader. Great little thinker!!!!!
Claude Tardif and Harley Weston lui répond. |
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2^10 = -1/2^x - 1 |
2004-12-13 |
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Randy pose la question :
Could you explain to me how the following equation is solved please.
2^10 = -1/2^x - 1
Harley Weston lui répond. |
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ln(x)/x |
2004-12-11 |
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Tina pose la question :
What is the derivative of (ln x)/x? The double derivative?
Penny Nom lui répond. |
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A geometric proof |
2004-12-11 |
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Hanna pose la question :
Given: ABCD is a quadrilateral;
Prove: ABCD is a parallelogram
Penny Nom lui répond. |
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A sequence |
2004-12-11 |
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Amanda pose la question :
Find the nth term of the following sequence
4, 10, 28, 82
Penny Nom lui répond. |
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Three calculus problems |
2004-12-09 |
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Ashley pose la question :
Hi, I am having a lot of trouble with three calculus questions and was wondering if you could help
Penny Nom lui répond. |
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