an open box is to be formed out of a rectangular piece of cardboard whose length is 12cm longer than its width. to form the box, a square of side 5cm will be removes from each corner od the cardboard. then the edges of the remaining cardboard will be turned up. if the box is to hold at most 1900cm³ what mathematical statement would represent the given situation
a. x² - 12x ⩽ 360 b. x² - 12x ⩽ 380 c. x² - 8x ⩽ 400 d. x² + 8x ⩽ 400
