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 interval of time is the ball more than 256 above the ground?
A. {x ? 7 sec < x < 13 sec}
B. {x ? 2 sec < x < 8 sec}
C. {x ? 1.5 sec < x < 8.5 sec}
D. {x ? 4.5 sec < x < 5.5 sec}
Answer: B
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A. 
B. 
C. 
D. 
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The repetitive nearest-neighbor tour starting with vertex D is given by:
A. D, C, A, B, E, D. B. D, B, E, C, A, D. C. D, A, B, E, C, D. D. D, E, A, B, C, D. E. none of these
Find the whole.23 workers is 4% of what number of workers?
A. 57.5 B. 575 C. 5750 D. 92
Find the slope of the line.y = 4x + 8
A. - 
B. 4
C. 
D. 8