Posted by **Sally** on Wednesday, October 13, 2010 at 12:34am.

Suppose you drop a ball from the top of a five-story building onto the sidewalk 70 feet below.

a. What is the initial velocity of the ball?

b.Determine a function for the height of the ball t seconds after it's released.

c. How long will the ball be in the air before it hits the ground?

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