The width of a rectangle is increasing at a rate of 5 in./s and it's length is increasing at the rate of 4 in./s. At what rate is the area of the rectangle increasing when is weight is 2 inches and its length is 7 inches?The rate that the area of the rectangle is increasing is _ in^2/s

The width of a rectangle is increasing at a rate of 5 inches per second and its length is increasing at the rate of 4 inches per second. At what rate is the area of the rectangle increasing when its width is 2 inches and its length is 7 inches? [Hint: Let W(t) and L(t) be the width and length, respectively, at time t.] es & The rate that the area of the rectangle is increasing is in2/ s. (Simplify your answer.)