Solve the problem.The maximum monthly average temperature in Smithville is 87° in July, and the minimum is 35° in January. Determine 
so that f
models the monthly average temperature in Smithville, where x is the month and 
corresponds to January.
A. f
= 26 cos 
+ 61
B. f
= 61 cos 
+ 26
C. f
= 26 cos 
+ 61
D. f
= 26 cos 
+ 61
Answer: C
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Calculate the effective annual rate for an investment that earns 7.5% interest compounded quarterly. Round to the nearest hundredth of a percent.
a. 7.71% b. 7.69% c. 7.76% d. 7.64% e. 7.50%
Solve the problem.John owns a hot dog stand. His profit, in dollars, is given by the function 
where x is the number of hot dogs sold. What is the most he can earn?
A. $63 B. $117 C. $81 D. $36
Name the quadrant in which the angle ? lies.tan ? < 0, sin ? < 0
A. I B. II C. III D. IV
Discuss the equation and graph it.r = 
A. directrix perpendicular to polar
axis 1 left of pole
focus (0, 0), vertex 
B. directrix parallel to polar
axis 1 above pole
focus (0, 0), vertex 
C. directrix parallel to polar
axis 1 below pole
focus (0, 0), vertex 
D. directrix perpendicular to polar
axis 1 right of pole
focus (0, 0), vertex 
