SOLUTION: A baseball is hit by a batter. The function s(t) = -16t to the second power + 140t + 3 models the ball's height above the ground, s(t) in feet t seconds after it was hit. How

Algebra ->  Algebra  -> Quadratic Equations and Parabolas -> SOLUTION: A baseball is hit by a batter. The function s(t) = -16t to the second power + 140t + 3 models the ball's height above the ground, s(t) in feet t seconds after it was hit. How      Log On

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Question 70: A baseball is hit by a batter. The function
s(t) = -16t to the second power + 140t + 3
models the ball's height above the ground, s(t) in feet t seconds after it was hit. How long will it take for the ball to strike the ground? Round to the nearest tenth of a second.
Answer by ichudov(499) About Me  (Show Source):
You can put this solution on YOUR website!
The ball strikes the ground when s(t) is equal to zero, since hitting the ground is equivalent to saying that the ball is at zero height.
So, we have a problem: find t such that s(t) = 0.
-16t%5E2%2B140t%2B3+=+0
Solve it with my quadratic solver.