+33 A person standing close to the edge on top of a 28-foot building throws a ball vertically upward. The quadratic function h=−16t2+108t+28h=-16t2+108t+28 models the ball's height about the ground, h, in feet, t seconds after it was thrown.
What is the maximum height of the ball?
How many seconds does it take until the ball hits the ground?
Thankss
