10. A batter hits a baseball straight up in the air. The height of the baseball in metres above the ground is given by Mr) - 4.911 + 23\" 2, where t is the number of seconds alter the ball is hit. a) Determine the time at which the baseball hits the ground. b) What is the average rate of change in the height of the ball over the interval 1.5 S t S 2? 0) Estimate the instantaneous rate of change 01 the baseball's height at 2 seconds. [8 D1] 11. For each scenario below, use a different situation to describe a real-life situation that corresponds. a) A constant positive average rate of change b) A non-constant negative rate of change. 0) A zero-average rate of change. [3 D1] Page 7/7