A rock is thrown directly upward with an initial velocity of 117 feet per second from a cliff 257 feet above a beach. The height of the rock above the beach h after t seconds, is given by the equation h=−16t squared+117t+257
Part A: When will the rock be 370 feet above the beach? If you have more than one answer, separate them with a comma. If necessary, round to 2 decimal places.
Part B: When will the rock hit the beach? If you have more than one answer, separate them with a comma. If necessary, round to 2 decimal places.
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