Solve the problem.An experiment in a wind tunnel generates cyclic waves. The following data is collected for 60 seconds:
Let V represent the wind speed (velocity) in feet per second and let t represent the time in seconds. Write a sine equation that describes the wave.
A. V = 70 sin(60t - 30) + 24
B. V = 46 sin (60t - 30) + 23
C. V = 23 sin 
+ 47
D. V = 70 sin 
+ 24
Answer: C
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Solve the problem.Suppose that we wish to seat eight people, 4 men and 4 women, in a row of eight chairs. In how many ways can we seat the people if the men and women must alternate?
A. 80,640 ways B. 576 ways C. 1152 ways D. 48 ways
Add or subtract as indicated.
- 
A. 
B. 
C. 
D. 
XC = 72.7 ê IC = 28.2 mA IR = 38.8 mA
Solve the problem.The president of a certain university makes three times as much money as one of the department heads. If the total of their salaries is $170,000, find each worker's salary.
A. president's salary = $12,750; department head's salary = $4250 B. president's salary = $127,500; department head's salary = $42,500 C. president's salary = $85,000; department head's salary = $42,500 D. president's salary = $42,500; department head's salary = $127,500