A manufacturer of open steel boxes has to make one with a square base and a volume of 1 m3. The steel costs $2 per square metre. орen y m a If the base measures x m by x m and the height is y m, find y in terms of x. 6 Hence, show that the total cost of the steel is C(x) = 2x² + - x m 8 dollars. %3D c Find the dimensions of the box costing the manufacturer least to make.

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