Write the complex number in polar form. Express the argument in degrees, rounded to the nearest tenth, if necessary.2
A. 2(cos 270° + i sin 270°)
B. 2(cos 90° + i sin 90°)
C. 2(cos 180° + i sin 180°)
D. 2(cos 0° + i sin 0°)
Answer: D
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Describe the graph of the polar equation.r = 
A. Hyperbola passing through (6, 4) B. Line with slope 4 and y-intercept (0, -6) C. Line with slope 6 and y-intercept (0, -4) D. Ellipse centered at origin with intercepts (±4, 0) and (0, ±1)
An object attached to a coiled spring is pulled down a distance a from its rest position and then released. Assuming that the motion is simple harmonic with period T, write an equation that relates the displacement d of the object from its rest position after t seconds. Also assume that the positive direction of the motion is up.a = 16;
T = 7 seconds
A. d = -7 cos 
B. d = -16 cos 
C. d = -16 sin 
D. d = -16 cos 
The vectors u, v, and w are drawn below. Sketch the given vector. 
u + v
A. 
B. 
C. 
D. 
Solve.Find the sum of the first 403 odd natural numbers.
A. 162,812 B. 163,216 C. 161,604 D. 162,409