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Fractional part |
2009-04-01 |
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From Galina:
What fractional part of eight is eight hundredths
Answered by Stephen La Rocque. |
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The height of an arc at the peak |
2009-04-01 |
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From Ed:
What is the term used to describe the height of an arc at the peak?
Answered by Stephen La Rocque. |
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A spherical Tootsie Roll Pop |
2009-04-01 |
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From Tracy:
A spherical Tootsie Roll Pop you are sucking on is giving up volume at a steady rate of .8 ml/min. How fast will the radius be decreasing when the Tootsie Roll Pop is 20 mm across?
Answered by Harley Weston. |
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GCD (a + b, a - b). |
2009-04-01 |
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From Tomas:
Let a and b integer and relatively prime. Prove that:
GCD (a + b , a - b) = 1 or 2
Answered by Stephen La Rocque. |
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A five game average of 148 |
2009-04-01 |
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From Shelly:
(128 + 145 + 139 + 157 + x) divided by 5 = 148 matches the situation stated below:
A person bowled four games and scored 128, 145, 139, and 157. Find x, the score the person would need to have in the fifth game to average 148 for all five games.
How do I solve this and how am I supposed to add x like it says in the equation?
Answered by Penny Nom. |
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Why learn math? |
2009-04-01 |
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From Uno:
I got myself in a lot of trouble today. I got into an argument in school with my math teacher because while learning geometry I said that this was useless.
I don't understand why I need to learn algebra, geometry & trigonometry.
I don't see how we use this in real life and it is almost like my teachers don't know either. They say I have to learn it because... I don't think that is a good enough answer.
The only way I don't get suspended is if I can come up with real world applications of why we learn math.
I need help... I am already in deep trouble with my parents. Any resources on how learning a proof is used in real life?
Answered by Claude Tardif and Harley Weston. |
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Leading terms and leading coefficients |
2009-03-31 |
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From Susan:
Write the polynomial P(x)=x^3-3x^4+17x+11-4/3x^2 in descending order. Identify the leading term and the leading coefficient.
Answered by Penny Nom. |
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Square feet and acres |
2009-03-31 |
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From ROZELL:
how much land is 660'x400' also how many feet in one hundred acres
Answered by Harley Weston. |
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310,000 cubic yards of concrete |
2009-03-31 |
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From Mary:
I am interested in getting a good, general analogy for 310,000 cubic yards of concrete -
ideally as a length (miles) or distance between two US cities. Thanks!
Answered by Penny Nom. |
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A 25 team league |
2009-03-31 |
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From brad:
25 teams are in a league in which each team plays everybody once how many games must be scheduled ?
Answered by Penny Nom. |
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The length of a ladder |
2009-03-30 |
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From Susan:
The foot of an extension ladder is 7 ft. from a wall. The height that the ladder reaches on the wall and the length of the ladder are consecutive integers. How long is the ladder?
Answered by Penny Nom. |
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Four identical lots |
2009-03-30 |
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From Marina:
I really want to know the answer to this problem for my 6th grade son. I've already sent this question with the drawing but I couldn't send it correctly. I hope this one will pass through.
Q: Divide evenly and identical the figure representing a lot, into four for the 4 siblings. I've sent a figure drawing as attachment. I will describe this in case it will not reach you: its a square divide into 4 triangle and 1 triangle is taken out living a letter M figure and
this letter M figure is the one that will be divided.into 4 even and identical parts.
Marina
Answered by Claude Tardif. |
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More on the square root of 0.75 |
2009-03-30 |
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From Blaine:
I read your response to How is the square root of 3/4 is greater than 3/4?
What I'm hoping for is a way for my students to use their own experience and number intuition to be able to make sense of the issue. As soon as my kids see "if y is this and x is this then..." their little eyes glaze over. Unfortunately, I can't come up with a way myself. Thank you for your help.
Answered by Penny Nom and stephen La Rocque. |
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Grain of rice on a chess board |
2009-03-30 |
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From andy:
Is there an easy way for my students to find out 8 to the power of 21 to solve the grains of rice doubling investigation on a chessboard? Any suggestions welcome. Thanks very much
Answered by Robert Dawson and Claude Tardif. |
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A circle tangent to the X-axis |
2009-03-29 |
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From Kiera:
Find an equation of the circle that satisfies the stated conditions.
Center C(4,-1), tangent to the x-axis
Answered by Penny Nom. |
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