Mathematics, 05.03.2020 15:12 psychocatgirl1

The cost, in dollars, of producing x belts is given by Upper C (x )equals 751 plus 12 x minus 0.067 x squared. Find the rate at which average cost is changing when 256 belts have been produced.

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The cost, in dollars, of producing x belts is given by Upper C (x )equals 751 plus 12 x minus 0.067...