If a ball is thrown upward at 96 feet per second from a height of 4 feet, the height of the ball can be modeled by S=4 + 96t - 16t feet, where t is the number of seconds after the ball is thrown. How long after the ball is thrown is the height 112 feet?

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Polynomials

Try substituting 1. You will get 6 and not 0. Try other real values also. What About -2? Let us check.