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Quandaries & Queries
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 Topic: dam
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 An antiderivative problem 2009-08-13 From Indrajit:∫4e^x + 6e^-x/(9e^x + 4e^-x)dx = Ax + Bloge(9e2x - 4) + C then A=?......B=?.....C=? plz solve it...."^" stands for "to the power of"....Answered by Harley Weston. The product of the digits of a four digit number 2008-07-26 From Pete:I am a student preparing for a competition and this was one of the prep problems: The product of the digits of a four digit number is 6x5x4x3x2x1. how many such numbers are there with this property?Answered by Stephen La Rocque. The volume of a dam 2008-03-23 From JD:How many cubic yards of soil are required to build a small Pond Dam: 100ft wide bottom x 300ft long x 15ft High with a 14ft wide Flat topAnswered by Harley Weston. Choosing a car 2001-04-28 From Ashley:THE CAR DEALERSHIP IN TOWN OFFERS 32 DIFFERENT MODELS OF VIHICLES.EACH MODEL HAS A CHOICE OF EIGHT INTERIOR COLORS,EIGHT EXTERIOR COLORS,AND ALSO THE OPTION OF AUTOMATIC OR MANUAL TRANSMISSION. HOW MANY COMBINATIONS ARE POSSIBLE?Answered by Penny Nom and Andrei Volodin. Calculus Research Questions 2000-05-22 From William Wright:I am a Calculus Teacher, and me and my class ran into these two problems without solutions in my manual, we got answers, but are unable to check them. If anyone gets this email and can respond to this with the solutions it be greatly appreciated. ...Answered by Harley Weston.

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