A box without a top is to be constructed by cutting 5-inch squares from each of the four corners of a square piece of cardboard. Assuming the box is to hold 480 cubic inches, write the quadratic equation used to find the length of the original piece of cardboard. A.480 = (x-5)(x-5)(10) B.480 = (x-10)(x-10)(5) C.480 = (x -10)(x-10) (10)