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Calculus1 9 Online
OpenStudy (anonymous):

related rates help. Suppose x thousand watches can be sold at p dollars per watch where p+x^2 = 144. How fast is the demand changing when x=9, p=63 and the price per watch is increasing at the rate of $2/week? Please do a step by step explanation. The answer is dx/dt = -1/9 so lets see how they got that. thanks.

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