Write the complex number in polar form. Express the argument in degrees, rounded to the nearest tenth, if necessary.15 + 20i
A. 25(cos 233.1° + i sin 233.1°)
B. 25(cos 126.9° + i sin 126.9°)
C. 25(cos 53.1° + i sin 53.1°)
D. 25(cos 306.9° + i sin 306.9°)
Answer: C
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Solve the problem.An oil storage tank can be described as the volume generated by revolving the area bounded by 
about the x-axis. Find the volume 
of the tank.
A. 44.3 m3 B. 1320 m3 C. 1.85 m3 D. 177 m3
Solve the problem.Find the point on the line 
that is closest to the origin.
A. 
B. 
C. 
D. 
Simplify, if possible.
A. -6x
B. -1
C. 
D. 1
Determine the domain and range of the relation.{(7, -6), (7, -5), (-5, 3), (-4, -2), (-9, 1)}
A. Domain: {-5, 3, 1, -2, -6}; Range: {7, 7, -5, -9, -4} B. Domain: {7, -7, -5, -9, -4}; Range: {-5, 3, 1, -2, -6} C. Domain: {7, 7, -5, -9, -4}; Range: {-5, 3, 1, -2, -6} D. Domain: {7, -5, -9, -4}; Range: {-5, 3, 1, -2, -6}