A boy throws a baseball across a field. The ball reaches its maximum height, 18 meters, after 1 second. After approximately 2.3 seconds, the ball lands on the ground. The ball’s motion can be modeled using the function f(x) = –10x2 + 20x + 8. What is the height of the ball 1.5 seconds after it is thrown?
Since the ball will reach the maximum
height of 18 meters after 1 second, meaning after 1 second it will start to go
down. So will expect that the height will be lower than 18 m after 1.5 s.