Question 974698
A BALL THROWN UPWARD WITH AN INITIAL VELOCITY OF 48 FT/SEC FROM A HEIGHT 864 FT.  ITS HEIGHT S, IN FEET, AFTER T SECONDS IS GIVEN BY S= -16T^2 +48T+864.  AFTER HOW LONG WILL THE BALL REACH THE GROUND?
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S= -16T^2 +48T+864 = 0
S = 0 at impact
Solve for t
Ignore the negative solution.