Assume that an airplane is flying toward you at a constant height of 2 miles and at a speed of 100 miles per hour. When the plane is 20 miles away, what is the rate of change of 0? cot (0) = h o de di = 0.5 degree/hr o de dt = .25 degree/hr O de dt = 0.45 degree/hr O de = -0.5 degree/hr