"Question 9
A person standing close to the edge on top of a 64-foot building throws a ball vertically upward. The quadratic function h(t) 16t2 + 48t + 64 models the ball's height about the ground, h(t), in feet, t seconds after it was thrown.
a) What is the maximum height of the ball?
100
feet
b) How many seconds does it take until the ball hits the ground?
seconds"