A ball is thrown up at the edge of a 550 foot cliff. The ball is thrown up with an initial velocity of 87 feet per second.

Its height measured in feet is given in terms of time t, measured in seconds by the equation
h = -16 t^2 + 87 t + 550

a. How high will the ball go and how long does it takes to reach that height? feet seconds
b. How long does it take the ball to come back to the ground ?