SOLUTION: Suppose a bottle rocket is launched upward with a velocity of 96 feet a second, and from a height of 880 feet. After how long will the rocket reach the ground?

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Question 1034120: Suppose a bottle rocket is launched upward with a velocity of 96 feet a second, and from a height of 880 feet. After how long will the rocket reach the ground?
Answer by ikleyn(52803) About Me  (Show Source):
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Suppose a bottle rocket is launched upward with a velocity of 96 feet a second, and from a height of 880 feet.
After how long will the rocket reach the ground?
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An equation for the rocket's height "h" (in feet) above the ground is

-16t%5E2+%2B+96t+%2B+880 = 0,

where t is the time after the launch and "0" is the ground level.


Solve it for t.  The positive root "t" will be your answer.


For simplicity, start by canceling the factor 16.