 |
|
|
|
|
|
|
|
|
Rounding |
2007-11-05 |
|
Charles pose la question :
I have been asked to explain why rounding to 3 decimal places
has become the adopted industry standard in mathematics for
showing measurement calculations. I understand that it makes
sense to round financial calculations to 2 d.p. because then it's
rounded to the nearest penny (or cent) but why would the standard
in measurement be 3?
Stephen La Rocque lui répond. |
|
|
|
|
|
|
Six crates of cantaloupes |
2007-11-05 |
|
BARBARA pose la question :
The average weight 6 crates of cantaloupes is 61 lbs, if 3 of the crates weigh 72, 59, and 70 lbs. which of the following could be the weight in pounds of the other 3 crates?
a. 49,59,60
b. 51,53,54
c. 53,57,58
d. 54,56,60
e. 57,57,57
Stephen La Rocque and Penny Nom lui répond. |
|
|
|
|
|
|
Great circles |
2007-11-05 |
|
Lindsay pose la question :
Does a sphere have only ONE great circle? Explain?
Stephen La Rocque lui répond. |
|
|
|
|
|
|
Two cars |
2007-11-04 |
|
Jalisa pose la question :
If Car "A" is traveling 50 miles per hour and car "B" is traveling 60 miles per hour, how long will it take car "B" to catch up to car "A" if car "A" had a 15 mile head start.
Penny Nom lui répond. |
|
|
|
|
|
|
The height of a triangle |
2007-11-03 |
|
William pose la question :
I need to find the height of a triangle if the base is 15, one side is 14 and the other side is 13.
Stephen La Rocque and Penny Nom lui répond. |
|
|
|
|
|
|
Return on investment |
2007-11-02 |
|
Julie pose la question :
Hi - I'm trying to figure out what my ROI ( Return on my investment) is for a particular product I purchased. My investment cost was $4100 and my savings as a result of this investment was $34,170. How can I figure out what my ROI was on this product. Thanks much for your help!
Penny Nom lui répond. |
|
|
|
|
|
|
Chris has twice as many $1 bills as pennies |
2007-11-02 |
|
vicky pose la question :
Chris has twice as many $1 bills as pennies, twice as many dimes as he has $10 bills, and twice as many pennies as he has dimes. How much money does he have?
Penny Nom lui répond. |
|
|
|
|
|
|
Stem & Leaf Plots |
2007-11-02 |
|
Jen pose la question :
Trying to help my Gr.4 son with his math and i am a little lost here are the
stem and leaf plots..
Stem Leaves
4 02
3 1226699
2 011255789
1 33357899
Stem Leaves
2 00011111223334455
1 range566788899
Question - How are the ranges for the stem & leaf plots different ?
Penny Nom lui répond. |
|
|
|
|
|
|
I have a piece of material 44 inches by 78 inches |
2007-11-02 |
|
Marianne pose la question :
I have a piece of material 44 inches by 78 inches. How many linear yards can I get from it?
Penny Nom lui répond. |
|
|
|
|
|
|
Convert a diameter of a pencil into centimeters |
2007-11-02 |
|
Kaitlyn pose la question :
I need to convert a diameter of a pencil into centimeters, but how many
diameters are in a centimetres? Thanks =)
Penny Nom lui répond. |
|
|
|
|
|
|
A right angle triangle |
2007-11-02 |
|
PRAIMNAUTH pose la question :
In a right angle triangle , knowing one angle (90 degree ) and the length of the base, how can you calculate the hight and the hypotenuse ?
Penny Nom lui répond. |
|
|
|
|
|
|
Completing the square |
2007-11-01 |
|
Mark pose la question :
An architect is designing a museum entranceway in the shape of a parabolic arch represented by the equation y = -x2 + 20x, where 0 x 20 and all dimensions are expressed in feet. Determine the maximum height, in feet, of the arch.
Stephen La Rocque lui répond. |
|
|
|
|
|
|
Questions of the Month |
2007-11-01 |
|
Judith pose la question :
Where would I find comprehensive questions, that cover the majority of skills in a unit such as number sense, to use as "Questions of the Month"?
Victoria West lui répond. |
|
|
|
|
|
|
The area of a regular pentagon |
2007-11-01 |
|
sarah pose la question :
i'm trying to find the area of a regular pentagon with 200m sides, ive split it into 5 triangles so i dont know either sizes of the lengths and i need to find the height!
how?
Penny Nom lui répond. |
|
|
|
|
|
|
How many combinations can there be for 12 games? |
2007-11-01 |
|
Melissa pose la question :
I am looking to find out how many different combinations there are in 12
sports games. Let's say I have 12 baseball games, total 24 teams, and
there can only be two results, win or lose, no ties. How many
combinations can there be for 12 games? Thank-you very much.
Penny Nom lui répond. |
|
|
