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Mathematics 10 Online
OpenStudy (anonymous):

A manufactorer determines that the number of drills it can sell is given by formula d=-4p^+160p-270, where p is the price of the drills in dollars. A. at what price will manufacturer sell the maximum of drills?

OpenStudy (anonymous):

This should be corrected as d=-4p^2+160p-270 if so, you can differentiate d with respect to p, then equate it to 0 (d is maximized) dd/dp=-8p+160 = 0 => p = 160/8

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