A ball is thrown vertically upward from the top of a building 144 feet tall...
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A ball is thrown vertically upward from the top of a building 144 feet tall with an initial velocity of 128 feet per second. The distances (in feet) of the ball from the ground after t seconds is s = 144 +128t- 16t2. After how many seconds does the ball strike the ground?8 sec145 sec9 sec11 sec
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