(45) A long rectangular sheet of metal, 16 inches wide, is to be turned up at both sides to make a horizontal gutter with vertical sides. How many inches should be turned up at each side for maximum carrying capacity? n (47) Using that Ci= n (n + 1) -3 evaluate the integral / (4 - 2x) dx by evaluating the limit of 2 i=1 Riemann Sums