Solve the problem.Decide which of the rational functions might have the given graph. 
A. f(x) = 1 - 
B. f(x) = 1 + 
C. f(x) = 1 - x
D. f(x) = 
- 1
Answer: A
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Find the derivative.
x8 - 
x4
A. 
x7 - 
x3
B. 4x7 - x3
C. 4x9 - x5
D. 4x8 - x4
Find the exact value of the expression.cos 
cos 
- sin 
sin 
A. 0
B. 1
C. -1
D. 
Solve the problem.Gerardo and Jaime like to exercise together by running laps on a track. Gerardo can complete 1 lap every 7 minutes, but it takes Jaime 9 minutes to complete 1 lap. If they start running from the same point on the track at the same time, in how many minutes will they be at the same point again?
A. 126 minutes B. 63 minutes C. 16 minutes D. 189 minutes
Use a graphing calculator to plot the data and find the quadratic function of best fit.The following table shows the median number of hours of leisure time that Americans had each week in various years.
Use x = 0 to represent the year 1973. Using a graphing utility, determine the quadratic regression equation for the data given. What year corresponds to the time when Americans had the least time to spend on leisure?
What will be an ideal response?