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A rock is thrown off of a 100 foot cliff with an upward velocity of...

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A rock is thrown off of a 100 foot cliff with an upward velocity of 50 m/s. As a result its height after t seconds is given by the formula:h(t) = 100+ 50t - 5tWhat is its height after 3 seconds?What is its velocity after 3 seconds?(Positive velocity means it is on the way up, negative velocity means it is on the way down.)

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