Find all values of ? in [0, 360°) for which the following is true.cos ? = 
A. 60° and 120°
B. 210° and 330°
C. 60° and 300°
D. 150° and 210°
Answer: C
Mathematics
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Simplify.
+ 
A. 6
B. 6
C. 5
D. 5
Mathematics
Find the phase shift of the function.y = -3 cos 
A. - 
B. -3
C. 
D. 2?
Mathematics
Solve the problem.If a person puts 1 cent in a piggy bank on the first day, 2 cents on the second day, 3 cents on the third day, and so forth, how much money will be in the bank after 30 days?
A. $2.33 B. $4.65 C. $0.30 D. $9.30
Mathematics
Solve the problem.Using a phone card to make a long distance call costs a flat fee of $0.81 plus $0.16 per minute starting with the first minute. Find the total cost of a phone call which lasts 27 minutes.
A. $27.13 B. $5.13 C. $4.32 D. $22.03
Mathematics