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Please solve A homeowner wishes to insulate his 1,000-square-foot house's attic. The total cost C(r) for r inches of insulation and the heating costs for

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A homeowner wishes to insulate his 1,000-square-foot house's 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 7350 C(r) = 150r + r How many inches of insulation should be placed in the attic if the total cost is minimized? inches

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