Express the product as a sum or difference.cos 3x cos 2x
A. 
(cos 5x - cos x)
B. cos2 6x2
C. 
(cos x + cos 5x)
D. 
(cos 5x - sin x)
Answer: C
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Refer to the double-bar graph below which shows the number of male and female athletes at a university over a four-year period. Solve the problem.
Find the increase in the number of female athletes from year 2 to year 3.
A. 375 B. 150 C. 175 D. 125
Find the perimeter.
A. 366 in. B. 381 in. C. 326 in. D. 308 in.
Find the midpoint of the line segment joining the two points.
and 
A. 
B. 
C. 
D. 
Solve the problem.The following table shows the median number of hours of leisure time per week for Americans in various years.
Let f(t) be the median number of hours of leisure time at t years since 1993. Use a graphing calculator to draw a scatterplot to describe the data. Using the same viewing window, draw the graph of the quadratic model 
Use the model to estimate the years when the median number of hours of leisure time per week is 22.
What will be an ideal response?