Solve the problem.At a ticket booth, customers arrive randomly at a rate of x per hour. The average line length is 
where 
To keep the time waiting in line reasonable, it is decided that the average line length should not exceed 10 customers. Solve the inequality 
to determine the rates x per hour at which customers can arrive before a second attendant is needed.
A. 0 ? x ? 17
B. 0 ? x ? 20
C. 0 ? x ? 18
D. 0 ? x ? 19
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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Use a day counting table to find the exact number of days from the first date to the second date. Assume the year is not a leap year unless otherwise indicated.September 11 to November 23
A. 327 B. 72 C. 73 D. 104
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Find, correct to the nearest degree, the angle between the planes.
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Mathematics
Solve.-3x + 19 - 9x = -8x + 35
A. x = - 
B. x = - 4
C. x = - 
D. x = 4
Mathematics