400 A' (7) A carpenter has been asked to build an open box with a square base. The sides of the box will cost $3 per m and the base will cost $4 per m2. What are the dimensions of the box of greatest volume that can be constructed for $48? V ? = 4 - x 2 V= XZh * 2 + 4*h A = X 0 = 4 -42