# Business Calculus - A homeowner wishes

Anonymous

Question description

A homeowner wishes to insulate his 1500-sq-foot attic. The total cost C(r) for r inches of insulation and the heating costs for that amount of insulation over the next 10 years is given by C(r)=120r+4320/r. How many inches of insulation should be placed in the attic if the total cost is to be minimized?

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