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	Solving an equation for D		2008-12-18
		Darrin pose la question : In his finance class, my son is being asked to take the following equation and solve for "D": 1 / [1 - (1 + D/12)^T] = (1 / D) * [((12*B) / (P*T)) + Y + ((12N * Z) / (360T))] - [(12Z) / (360T)] * F Robert Dawson lui répond.
	The volume of a feed hopper		2008-12-18
		John pose la question : I need to calculate the volume of a feed hopper, and I'm not sure how to break it down. The top of the hopper is 36" x 36", it is 30" deep, and ends at a 6" x 6" plate. One side of the hopper is straight top to bottom, of course tapering on two sides to meet at the plate. The other three sides angle down at about 75 degrees. I need to determine the cubic foot volume of this hopper (it is used for ground coffee) so I can configure a vibrator to knock down residual grounds. Thanks. Robert Dawson lui répond.
	Integral of cos^2 X between pi/2 and 0		2008-12-18
		Wanda pose la question : Integral or Area of cos^2 X between pi/2 and 0. The answer that I got is -pi/4. Is this correct? If not, how did you come up with your answer? Robert Dawson lui répond.
	The inverse function for F(x)=x^3+x		2008-12-18
		alireza pose la question : I want inverse function for F(x)=x^3+x Robert Dawson lui répond.
	The 2 rightmost digits		2008-12-18
		Peter pose la question : Is there a pattern for the 2 rightmost digits of a power? For example, one problem for a math competition was what are the 2 rightmost digits of 3^1993? Robert Dawson and Victoria West lui répond.
	Coefficient of variation		2008-12-17
		JR pose la question : I have read your reponses regarding the coeffcient of variation (CV) and find them very useful. I still have a question about interpreting the CV. Let's that the CV of sample #1 is 3% and that of sample #2 is 12%. Can I report that Sample #2 is 4 times more variable than sample #1? Thanks in advance! Robert Dawson lui répond.
	The angle between two lines		2008-12-17
		abhi pose la question : how to calculate the angle between two lines, given the length of the lines.. angle should vary from 0 - 360 in the counterclockwise direction Robert Dawson and Harley Weston lui répond.
	An equilateral triangle		2008-12-17
		lorraine pose la question : an equilateral triangle has side lenghts of10.the length of its altitude is? Penny lui répond.
	Solve for x		2008-12-16
		Melissa pose la question : I have a test tomorrow and I'm hoping you can help me before then. I can never seem to solve the "RESOLVE X" problems, or in french resous pour x/ They look like this. 3x+2\6=2x-5\3. I only understand NOTHING from that. Another equation is 2(x+1)=3(x+2). Robert Dawson and Penny Nom lui répond.
	What is a group of three numbers within a larger number?		2008-12-16
		kim pose la question : My daughter brought home a question for math homework. What is a group of three numbers within a larger number? Robert Dawson and Harley Weston lui répond.
	Order from least to greatest		2008-12-16
		staci pose la question : order from least to greatest on a number line, 7/10 3/5 5/10 Robert Dawson lui répond.
	Two numbers		2008-12-15
		HERB pose la question : I am thinking of two whole numbers. When I add them , their sum is 123. When I subtract the lesser number from the greater number their difference is 45. What are my numbers? Penny Nom lui répond.
	Why is the difference between british and american counting?		2008-12-15
		Muhammad pose la question : Why is the difference between british and american counting? Example 1 Billion american = 1,000,000,000 but, 1 Billion British = 1,000,000,000,000 Robert Dawson and Harley Weston lui répond.
	The middle term of an arithmetic sequence		2008-12-15
		Leigh pose la question : Find the sum of the first fifteen terms of an arithmetic series if the middle term is 92 Penny Nom lui répond.
	Surface area of an irregular shape		2008-12-15
		Patrick pose la question : An irregular shaped object (lets say a gold nugget, not smooth with pockets) can have its volume determined by comparing its mass in water. Is there any method or means or anything that could be used to determine the surface area of this shape? Whether that be theoretical mathematical formula to using a special infrared technique,etc... The problem I foresee is that the component parts cannot be divided into smaller geometric shapes. I would propose an answer although I don't know if it is a good one: A liquid material that dries super-thin, but has a very specific and easily determined volume/mass is coated over the object. Measure the mass difference between the beginning sample of fluid and the mass after the object has been coated. Then determine the surface area of the same mass of fluid in a geometric shape. Is this feasible? Robert Dawson lui répond.

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