Graph the function over a one-period interval.y = 3 cos
A. 
B. 
C. 
D. 
Answer: D
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Determine the symmetries of the curve.r = 9 cos 5?
A. y-axis only B. x-axis, y-axis, origin C. Origin only D. x-axis only
Solve the problem.During the first day of an epidemic 8000 people get sick, during the second day 16,000 people get sick, and so on with the number of people getting sick increasing by 8000 each day. The epidemic peaks after 30 days with 8000 fewer people getting sick on the 31st day than on the 30th day, and so forth. What is the total number of people who get sick?
A. 7,440,000 B. 6,960,000 C. 7,320,000 D. 7,200,000
Solve. Write the answer in simplest form.Inga read 
of her book on Monday, 
of her book on Tuesday, and 
of her book on Wednesday. What part of her book has she read?
A. 
B. 
C. 
D. 
Solve the system by graphing. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. no solution; ? B. {(3, 1)} C. {(2, 14)} D. {(1, 3)}