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  3. a worker drops a hammer from a height of 784 feet.

A worker drops a hammer from a height of 784 feet. The height of the...

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A worker drops a hammer from a height of 784 feet. The height of the hammer, in feet, at t seconds is given by s(t) = -16t + 784.a) What is the average velocity of the hammer between 2 and 6 seconds?b) What is the instantaneous velocity of the hammer at 5 seconds?c) After how many seconds will the hammer hit the ground?d) What is the instantaneous velocity of the hammer as it hits the ground?

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