Solve the problem.A ball is thrown vertically upward with an initial velocity of 160 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 384 above the ground (after it is tossed until it returns to the ground)?
A. {x ? 4 sec < x < 6 sec}
B. {x ? 0 sec < x < 4.5 sec and 5.5 sec > x > 10 sec}
C. {x ? 0 sec < x < 4 sec and 6 sec > x > 10 sec}
D. {x ? 0 sec < x < 3.5 sec and 6.5 sec > x > 10 sec}
Answer: C
Mathematics
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A. y = 9
B. y = - 
x + 9
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, ? lies in quadrant III
Find sin 2?.
A. 
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C. 
D. - 
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A. 
B. 
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D. 128
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