Posted by **bill** on Sunday, March 7, 2010 at 10:14pm.

A projectile is fired directly upward with a muzzle velocity of 860 feet per second from a height of 7 feet above the ground.

a. Determine a function for the height of the projectile t seconds after itâ€™s released.

b. How long does it take the projectile to reach of height of 100 feet on its way up?

c. How long is the projectile in the air?

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