Solve the problem.A ball is thrown vertically upward with an initial velocity of 128 feet per second. The distance in feet of the ball from the ground after t seconds is 
For what intervals of time is the ball less than 112 above the ground (after it is tossed until it returns to the ground)?
A. {x ? 1 sec < x < 7 sec}
B. {x ? 0 sec < x < 3.5 sec and 4.5 sec > x > 8 sec}
C. {x ? 0 sec < x < 0.5 sec and 7.5 sec > x > 8 sec}
D. {x ? 0 sec < x < 1 sec and 7 sec > x > 8 sec}
Answer: D
Mathematics
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