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Mathematics 18 Online
OpenStudy (anonymous):

An aquarium with a square base has no top. There is a metal frame. Glass costs 3 dollars/m^2 and the frame costs 10 dollars/m. The volume is to be 20 m^3. Express the total cost C in terms of the height h in meters. (Hint: work out the cost of the glass and frame separately.) C(h) = $

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