Quadratic Equations Practice Test

A ball's height (in feet) is modeled by $h(t)=-16t^2+64t+80$. At what time $t$ (in seconds) is the ball at a height of 120 feet for the later of the two times?

A ball is thrown upward from a platform; its height in feet is given by $h(t)=-16t^2+32t+48$, where $t$ is time in seconds. When does it hit the ground?