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On the moon of a distant planet, the force of gravity is ⅙ that of Earth's gravity. The equation for free fall on this moon, in feet, is h(t) = -t² + initial velocity + initial height where, initial velocity= 200 feet initial height= 300 feet supposed an astronaut tossed a ball off the rim of crater 300 feet above it's floor. The ball's initial velocity is 20 feet per second. when will the ball hit the bottom of the crater?

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