1 1 Exercises 1 The height above ground h of a bailt seconds after being dropped given by the equation h t 4 91 60 and shown on the graph below MO a How high is the ball at f 2 seconds b How long does it take the ball to hit the ground c When is the ball at a height of 10 meters d When will the height of the ball be greater than 10 meters e Using the graph estimate the height of the ball at t 1 second then use the equation fo above to find the exact value f Using the graph estimate at what time the ball will be a height of 20 meters then u formula for h above to find the exact value