Let l be the length of a diagonal of a rectangle whose sides have lengths as and y , and assume that x and y vary with time. If a: increases at a constant rate of % ft/s and 3/ decreases at a constant rate of % ft/s, how fast is the size of the diagonal changing when w = 3 ft and y = 5 ft? Round your answer to four decimal places. Be sure to choose correct units. A? v