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Mathematics 9 Online
OpenStudy (anonymous):

If a football player passes a football from 4 feet off the ground with an initial velocity of 36 feet per second, how long will it take the football to hit the ground? Use the equation h = –16t2 + 36t + 4.

OpenStudy (anonymous):

If an object is on the ground, then it has a height of 0. So, you can determine the time t when the ball hits the ground by setting the height equal to 0: 0=-16t^2 + 36t + 4

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