A Rectangular Piece of Cardboard Measuring 17 Inches by 30

Multiple Choice

A rectangular piece of cardboard measuring 17 inches by 30 inches is to be made into a box with an open top by cutting equal size squares from each corner and folding up the sides. Let x represent the length of a side of each
Such square. For what value of x will the volume be a maximum? If necessary, round to 2 decimal places.

A) 12.18 in.
B) 14.7 in.
C) 3.49 in.
D) 24.35 in.