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Proof that any side of a triangle is less than half the perimeter. 2007-07-07
Omkar pose la question :
Any side of a triangle is smaller than half of its perimeter, prove this in short ?
Stephen La Rocque lui répond.
Five button push lock 2007-07-06
Jeffrey pose la question :
We have a 5 button push lock and we were wondering how many different codes were possible in this situation. In this lock each button can only be pressed once (ie it's not a numbered key pad) and order matters. How would we find out the # of possible codes?
Stephen La Rocque lui répond.
Can't find circumference of an ellipse 2007-07-06
Michele pose la question :
I need to figure the circumference of an oval and I know the height and width.
Penny Nom lui répond.
Surface area of a coin 2007-07-05
Anne pose la question :
Assuming both sides of a coin are identical, and a line tangent to the inner circle is 23 mm from edge to edge of the coin, and excluding the edge of the coin in the calculation, what is the surface area of the coin, in square millimetres?
Stephen La Rocque lui répond.
Trig identities 2007-07-05
Alex pose la question :
Use the identities tan_=sin_/cos_ and/or sin*_+cos*_=1 to simplify 1-cos*_
Stephen La Rocque lui répond.
Finding the radius of an inscribed circle 2007-07-05
Maria pose la question :
I need to find the radius of a circle which is inscribed inside an obtuse triangle ABC. I know all the angles and all the lengths of the triangle.
Stephen La Rocque and Chris Fisher lui répond.
How to convert fractions to percentages 2007-07-05
Anita pose la question :
How do I turn 1 3/20 to a percent?
Stephen La Rocque and Melanie Tyrer lui répond.
Using calculus to prove the formula for the area of a triangle 2007-07-04
Apratim pose la question :
Using calculus how can one show that the area of any triangle is 1/2 times its base times its height?
Stephen La Rocque lui répond.
Tons of concrete 2007-07-03
Trey pose la question :
I have 300,000 square feet of concrete and want to know how to convert this to tons?
Harley Weston lui répond.
How many ounces in 782 cubic centimetres? 2007-07-03
wilma pose la question :
how many ounces in 782cubic centimetres
Penny Nom lui répond.
An irregular hexagon 2007-07-03
Rebecca pose la question :
I need to find the shape of an irregular hexagon, but only have the lengths four of the sides.

It actually looks like a rectangle with a trapezoid on top of it.

The bottom of the rectangle is 150'. The sides are 75'. The length of the top is 130'. I do not have the lengths of the two smaller sides.

Is there any way to find the area of this shape?

Penny Nom lui répond.
A statistical difference 2007-07-03
a student pose la question :
I am writing a paper for a grad class in which I am comparing achievement levels of boys and girls. I have data that shows the average marks for girls and boys in each grade 12 subject for the entire province. My prof want me to show there is a statistical difference. What do I have to do to show this? I don't have access to the raw data, so don't know the SD. Is there anything I can do mathematically with the data that I have? (I can determine n for each set of data, it ranges between 2400 and about 13000 for each subject area.)
Chris Fisher and Harley Weston lui répond.
The volume of a pool 2007-07-03
maria pose la question :
we have a pool that is 2 feet by 5 feet by 3 1/2 feet - how many gallons of water does it hold
Stephen La Rocque lui répond.
I need to provide 712 cubic feet to water storage capacity 2007-07-03
William pose la question :
I need to provide 712 cubic feet to water storage capacity. If I use 15 inch diameter pipe, what would the length need to be to provide the capacity?
Stephen La Rocque lui répond.
A square and an equilateral triangle have the same perimeter. 2007-07-02
eve pose la question :
I am trying to help my daughter with the following problem: A square and an equilateral triangle have the same perimeter. The sum of one side of the square and one side of the triangle equals 28 cm. Find the sides of the figures.
Penny Nom lui répond.
 
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