the length of a rectangle is 3 times its width . if the width of the rectangle is 5 inches , what is the rectangle ' s area , in square inches ?
"if the width is 5 in and the length is 3 times the width , then the length is 3 * 5 = 15 in the area is given by 5 * 15 = 75 square inches correct answer b"
rectangle_area(5, multiply(3, 5))