Question

Sean dropped a ball from the top of a building 144 feet high. The height of the ball is represented by the equation h = -16t2 + 144 where t represents the time in seconds. Use factoring to determine how many seconds it takes for the ball to reach the ground.

Answer 1

height = 144

and the equation of ball h = -16t² + 144

h = -16t² + 144

-16t² + 144 = 0

16t² = 144

t² = 144/16

t² = 9

t = 3

The time is 3 sec