Question 14 You did not answer the question. An object moves along a straight path, its position at each time 1:20 is given by the function f(t)=3t4-48t3. Calculate the average rate of change of the object over the time period [5,8]. Answers are in units per time. a) -1536 b) 2 7 2 1 c) -2 100 d) -3072 e) None of the above