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Application of Quadratic Equations

On planet GH a ball is dropped from a height of 30ft ,and hits the ground in 5 sec.If a ball is dropped from the top of a 500ft building on this planet then how long will it take to hit the ground?
If Joey can throw a ball upward from the surface of the earth to a maximum height of 150 ft ,then how high up can he throw the ball on planet GH

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