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A rocket is fired upward from some initial distance above the ground. Its height (in feet), h, above the ground t seconds after it is fired is given by h ( t ) = − 16 t 2 + 80 t + 384 .
What is the rocket's maximum height? ______________ feet
How long does it take for the rocket to reach its maximum height? ___________ seconds
After it is fired, the rocket reaches the ground at t= ___________ seconds