Question

A ball is thrown vertically upward from the top of a building (when t=O seconds). Given the model, at what time does the ball hit the ground? h(t) is in metres and t is in seconds

Answer 1

g(t) = -16^2 + 96t + 112

0 = = -16^2 + 96t + 112

solve with quadratic formula

x = (7,-1)

-1 doesnt make sense

the ball hits the ground at 7 seconds