Question

The​ cost, in​ dollars, of producing x belts is given by Upper C left parenthesis x right parenthesis equals 805 plus 18 x minus 0.075 x squared. The​ revenue, in​ dollars, of producing and selling x belts is given by Upper R left parenthesis x right parenthesis equals 31 x Superscript six sevenths . Find the rate at which average profit is changing when 676 belts have been produced and sold. When 676 belts have been​ produced, the average profit is changing at nothing ▼ belts per dollar dollars per belt for each additional belt.

Answer 1