Posted by **Kayla** on Sunday, November 13, 2011 at 3:36pm.

A box is constructed out of two different types of metal. The metal for the top and bottom, which are both square, costs $2 per square foot and the metal for the sides costs $7 per square foot. Find the dimensions that minimize cost if the box has a volume of 30 cubic feet.

Length of base = ?

Height of side z = ?

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