13) A ball is launched vertically upward. Suppose that the height, h, in meters of the of the ball, after time, t, in seconds is given by h(t) = 40t - 3t. [A:3] a. Determine the average rate of change (AROC) over the interval [1,4]. b. Write the difference quotient expression at t = 3 seconds and simplify it. c. Substitute the following h-values in to the expression you obtain in part b) above and evaluate if; i. h = 0.001