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A price p (in dollars) and demand x for a product are related by 2 x^2...

A price p (in dollars) and demand x for a product are related by 2 x^2 + 2 x p + 50 p^2 = 20600. If the price is increasing at a rate of 2 dollars per month when the price is 20 dollars, find the rate of change of the demand. Rate of change of demand

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