Mitchell, a photographer, recently returned from a photo shoot in the Himalayas. Now in the editing phase, he decides that one photo of a climber needs an added visual effect. To give it the right look, he will place a solid border of equal width around the entire 24-by-36-inch photo. The total area of the photo and border in square inches can be modeled by the expression (24+2x)(36+2x), where x is the width of the border in inches. What does the quantity 36+2x represent in the expression? the area of the border in square inches the length of the photo and border together in inches the perimeter around the outside of the border in inches the total area of the photo and border in square inches