SOLUTION: If an object is thrown upward with an initial velocity of 64 ft/sec, its height after t sec is given by h = 64t -16t^2. Find the number of seconds the object is in the air before i

Question 203749: If an object is thrown upward with an initial velocity of 64 ft/sec, its height after t sec is given by h = 64t -16t^2. Find the number of seconds the object is in the air before it hits the ground.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
If an object is thrown upward with an initial velocity of 64 ft/sec, its height after t sec is given by h = 64t -16t^2. Find the number of seconds the object is in the air before it hits the ground.
---------------
It's at ground level when h = 0.
h = 64t - 16t^2 = 0
t = 0 seconds
t = 4 seconds
-------------
It's at ground level at 0 seconds, and returns to ground level after 4 seconds.

RELATED QUESTIONS
If an object is thrown upward with an initial velocity of 80 ft/sec, its height after t... (answered by HyperBrain)

If an object is thrown upward from the ground with an initial velocity of 128 ft/sec, its (answered by Alan3354)

If an object is thrown upward with an initial velocity of 48 ft/secs its height after t... (answered by robertb)

If an object is thrown upward with an initial veliocity of 64 ft/sec, its height after t... (answered by ankor@dixie-net.com)

Solve: If an object is thrown upward with an initial velocity of 64 ft/sec, its height (answered by nabla)

Solve: If an object is thrown upward with an initial velocity of 64 ft/sec, its height (answered by josmiceli)

Solve: If an object is thrown upward with an initial velocity of 64ft/sec, its height... (answered by stanbon,shahid)

a ball is thrown upward with an initial velocity of 64 ft/sec. from a height of 720 ft.... (answered by lwsshak3)

If an object is thrown upward with an initial velocity of 112ft/sec, it's height after t... (answered by ewatrrr)