A pine cone is 60 feet above the ground when it falls from a tree. The height h (in feet) of the pine cone
above the ground can be modeled by h = -16t2+ 60, where t is the time (in seconds) since the pine
cone started to fall.

a. Solve the equation for t. Write your answer in simplest form.
t=

b. After how many seconds will the pine cone be 20 feet above the ground? Round your answer to the
nearest hundredth.

The pine cone is 20 feet above the ground after about ____
seconds.