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The equation y = -4.9t^2 + 48t + 18.9 describes the height (in meters) of a ball tossed up in the air at 48 meters per second from a height of 18.9 meters from the ground, as a function of time in seconds. In how many seconds will the ball hit the ground?

 May 24, 2021
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Solve the quadratic and take the positive root to get 10.175.

 May 24, 2021

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