Find all the complex roots. Write the answer in the indicated form.The complex square roots of 100(cos 210° + i sin 210°) (polar form)
A. 10(cos 105° + i sin 105°), 195(cos 285° + i sin 285°)
B. 10(cos 210° + i sin 210°), 10(cos 195° + i sin 195°)
C. 10(cos 105° + i sin 105°), 10(cos 285° + i sin 285°)
D. 10(cos 210° + i sin 210°), -10(cos 195° + i sin 195°)
Answer: C
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Find the nth term of the arithmetic sequence with the given values.
, 
, - 
, . . . ; n = 20
A. - 
B. - 
C. - 
D. - 6
Make the following conversion involving the U.S. and metric systems.20 L = 
gal
A. 5.2 gal B. 21.2 gal C. 4.7 gal D. 9.0 gal
Find the area of the trapezoid.
A. A = 18 ft2 B. A = 16 ft2 C. A = 36 ft2 D. A = 15 ft2
Solve the problem.Brandon can paint a fence in 12 hours and Elaine can paint the same fence in 11 hours. How long will they take to paint the fence if they work together?
A. 5
hr
B. 5
hr
C. 5
hr
D. 11
hr