A mechanical engineer is testing how different springs stretch for a given force. Force is
measured in units called Newtons, abbreviated N. A spring stretches 2.5
millimeters for each 1-N force applied.

You have a square piece of cardboard that measures 14 inches on each side. to build a box, you cut congruent squares out of each corner of the cardboard. use the picture to find the area of the cardboard you were used to build the box