Question 345413
Given:
h= -16t^2 + 112t
.
Set h = 192 and solve for t:
192 = -16t^2 + 112t
0 = -16t^2 + 112t - 192
dividing both sides by -16:
0 = t^2 - 7t + 12
factoring:
0 = (t-3)(t-4)
t = {3, 4}
It will be at 192 feet at 3 and 4 seconds