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A ball is thrown from an initial height of 3 meters with an initial upward velocity of 20m/s. The ball's height (in meters) after seconds is given by the following h=3+20t-5t^2. Find all values of for which the ball's height is 13 meters.

 Jun 20, 2022
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The possible values of t are 5 and 8.

 Jun 20, 2022

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