Answered

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A ball is thrown upward at a velocity of 15 meters per second from a height that is 20 meters above the ground. The height h (in meters) of the ball at time ( (in seconds) after it is thrown can be found by the formula below

h − − 5t² + 15t +- 20

Find the time when the ball is again 20 meters above the ground​

Sagot :

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