Posted by **Andy G** on Tuesday, January 14, 2014 at 9:15pm.

ball thrown vertically upward with an initial velocity of 80 ft per second. The distance s(in ft) of the ball from the ground after t seconds is s=80t-16t^2.

a. draw the illustration.

b. for what time interval is ball more than 96 ft above ground?

c. what's the max height of ball?

d. after how many seconds does the ball reach max height?

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