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The equation  describes the height (in meters) of a ball tossed up in the air at 42 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? TYSM everyone who helped answer this.

 Dec 7, 2020
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You didn't include th equation,

   but set h= to 0  ( this is the height when the ball hits the grouand)  then solve the equation for t using the quadratic formula.

 Dec 8, 2020

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