Use braces to write the members of the set, or state that the set has no members.The positive-integer powers of 3
A. {1, 8, 27, 64, 125, . . .}
B. {1, 3, 9, 27, 81, 243, . . .}
C. {3, 9, 27, 81, 243, . . .}
D. {3, 6, 9, 12, 15, . . .}
Answer: C
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Use least common multiple or greatest common divisor to solve the problem.Planets A, B, and C orbit a certain star once every 2, 5, and 12 months, respectively. If the three planets are now in the same straight line, what is the smallest number of months that must pass before they line up again?
A. 19 months B. 60 months C. 24 months D. 120 months
Provide an appropriate response.Determine the measure of the acute angle ? for which cos ? = 
.
A. 30° 
B. 45° 
C. 90° 
D. 60° 
Provide an appropriate response.Is 
simplified?
Fill in the blank(s) with the appropriate word(s).
Find z1z2. Write your answer in standard polar form with the argument in radians.z1 = 2(cos 39° + i sin 39°), z2 = 5(cos 6° + i sin 6°)
A. 7(cos 234° + i sin 234°) B. 7(cos 45° + i sin 45°) C. 10(cos 33° + i sin 33°) D. 10(cos 45° + i sin 45°)