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	The region between two circles		2008-09-24
		From Carol: Good day! Here is a picture of the problem that we need to solve. (I send the picture through e-mail.) A small circle is inside a larger circle, the only given in the problem is the chord of the larger circle tangent to the smaller circle which measures 16cm. The question is, what is the area of the shaded region? Can you answer this question? Thanks! :) Answered by Harley Weston.
	Consecutive Even Integer Sides of a Triangle		2008-09-24
		From Brad: I am having a problem coming up with a formula for my son's eighth grade math problem. We have found the answer by guess and check but have a mental block on the equation. Any help would be appreciated. The problem is: A right triangle has sides whose lengths in feet are consecutive even intergers. Determine the length of each side. Thanks Answered by Janice Cotcher.
	Parallel Tangents		2008-09-24
		From manish: how many parallel tangents may a circle have? the text book shows two.but a crcle can have infinite tangents. Answered by Janice Cotcher.
	One acre, 1 foot deep		2008-09-23
		From ed: 1 acre square by 1 foot deep how many cubic yards Answered by Penny Nom.
	0.99999....		2008-09-23
		From Eve: Hi, i had a problem with change 0.99999... this recurring decimal to a fraction. I know the method, but the answer I got is 1 as you can see below. Where have i done wrong? Answered by Harley Weston.
	A three 0-9 tumbler lock		2008-09-22
		From Louis: I recently gave my daughter an old briefcase which uses a three 0-9 tumbler lock. She set the lock and now she can’t open one side. Q. Is there a 3 digit combination number generator available to give me the 1000 possibilities? Thanks, Lou PS In this type of lock you can repeat the same digit three times. Answered by Penny Nom.
	Probability: Marbles in a jar		2008-09-22
		From Andrea: Suppose you have a jar containing 100 red marbles and 100 white marbles. A) If you draw 5 marbles in a row, throwing each marble across as you draw it, what is the probability that at least one of them was red? B) If you draw 101 marbles in a row, throwing each one across the room as you draw it, now what is the probability that at least one of them was red? Answered by Harley Weston.
	Reciprocals		2008-09-22
		From Josina: What is the reciprocal of 1.8 and also send me the working of the answer Answered by Penny Nom.
	Sample variance: inches to centimeters		2008-09-22
		From Anita: The average height of a sample of basketball players is 6 feet, 2 inches or 74 inches. The standard deviation of this sample of players is 4 inches. If each person's height were to be multiplied by 2.54, what would be the value of the resulting sample variance? Answered by Harley Weston.
	Working together		2008-09-22
		From Wade: My daughter and I are having problems with this question: Maggie can mow the lawn in 6 hrs. If her sister, Julie, helps her, it only take 2 hrs. How long does it take Julie to mow the lawn alone. Answered by Penny Nom.
	The minimum value of f(x)=maximum{x,x+1,2-x}		2008-09-21
		From Saurabh: The minimum value of the function defined by f(x)=maximum{x,x+1,2-x} ? Answered by Penny Nom.
	Two consecutive numbers		2008-09-21
		From tomas: what is the two consecutive numbers with a product of 4160? Answered by Penny Nom.
	The sides of an octagon		2008-09-21
		From mark: I need to know the measurements of an octagon with a inside diameter of 34.5 inches from side to side Answered by Penny Nom.
	The area of a garden		2008-09-20
		From Hannah: How do you find the area of a semi circle when no measurement is given? The question is find the area of the garden which is semi circular. The measurements are 24m and 26m and the semi circle's height is 10m! Answered by Penny Nom.
	Markup as a percentage		2008-09-20
		From itzie: Okay, I've tried to make sense from some of the other questions and answers but I still don't see the answer that makes sense to me so here goes: I need an explanation on how $15.00 / .6 = $25 is a 40% and not as one would see it as a 60% mark up??? I don't get it. Answered by Penny Nom.

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