SOLUTION: A rock is thrown from the top of a tall building. The formula h = -16t + 234 describes the height of the rock, h in feet, t seconds after the rock is thrown. How long after the r

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: A rock is thrown from the top of a tall building. The formula h = -16t + 234 describes the height of the rock, h in feet, t seconds after the rock is thrown. How long after the r      Log On

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Question 933493: A rock is thrown from the top of a tall building. The formula h = -16t + 234 describes the height of the rock, h in feet, t seconds after the rock is thrown. How long after the rock is thrown does it hit the ground?
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
The formula h+=+-16t+%2B+234 describes the height of the rock, h} in feet, t seconds after the rock is thrown.
How long after the rock is thrown does it hit the ground?
Set h to zero (since when height = 0, it'll hit the ground)and
solve for t
0=+-16t+%2B+234
16t+=234
t=234%2F16
t=14.625
so, the rock will hit the ground in 14.625 seconds