Asked by Anonymous
A person drops a ball from a window, 20 meters above the ground. The height of the ball (meters) above the ground after the time (seconds) is described by the formula h = 20 - 5t ^ 2. Calculate the time it takes for the ball to hit the ground.
Answers
Answered by
Damon
0 = 20 - 5 t^2
t^2 = 4
t = 2
t^2 = 4
t = 2
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