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The equation y = -16t^2 + 28t + 180 describes the height (in feet) of a ball tossed up in the air at 28 feet per second from a height of 180 feet from the ground. In how many seconds will the ball hit the ground?

 Feb 25, 2022
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When the ball hits the ground, y = 0

so use the quadratic formula to solve

  0 = -16t^2 + 28t + 180                ( toss out the negaative 't' value)

 Feb 25, 2022

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