Mathematics, 17.03.2020 22:17 completed7

Suppose a rock is thrown off of a bridge into the river 120 feet below. The height, h, in feet of the rock above the river is given by h = −16t2 + 84t + 120, where t is the time in seconds. How long does it take the rock to splash into the river below?

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Suppose a rock is thrown off of a bridge into the river 120 feet below. The height, h, in feet of th...

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