squares ofaide x are to be removed from one end, and two equal rectangles are to be removed from the other end A box with a lid is to be made from a rectangular piece of cardboard measuring 42 cm by 126 cm. Two equal 1 so that the tabs can be folded to form a box with a lid. Find x such that the volume of the box is a maximum. x : cm (Type an integer or decimal rounded to the nearest tenth as needed.)