Question 1182154
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When the object hits the ground, its height is 0.<br>
Set h=0 in the given equation and solve for t.<br>
It doesn't look as if the quadratic is going to factor, so use the quadratic formula or a graphing calculator.<br>
Obviously there will only be one time when the ball hits the ground.  The quadratic equation will have a negative root; but obviously that root makes no sense in the given problem.<br>