An accessories company finds that the cost and revenue, in dollars, of producing x belts is given by C(x) = 710 + 38x –0.068x and R(x) = 35x 10 company's average profit per belt is changing when 177 belts have been produced and sold respectively Determine the rate at which the accessories. First, find the rate at which the average profit is changing when x belts have been produced P'(x) =D

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