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Ed hits a shot off the tee that has a height modeled by the function f(t) = -16t2 + 112t. How long is the ball in the air?
- AlanLv 71 month agoFavorite Answer
it hits the ground when f(t) =0
f(t) = -16t^2 + 112t
f(t) = -16t( t-7)
-16t = 0 seconds
t = 0
t = 7 seconds
so 7 seconds
- JimLv 71 month ago
The height is -16t² + 112t, and we want 0 feet.
0 = -16t² + 112t
0 = -16t (t - 7)
t must then be 0 or 7 sec to be at ground level.