Use DeMoivre's Theorem to find the indicated power. Write the answer in rectangular form.
4
A. 4
B. -4i
C. -4
D. 4i
Answer: C
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Provide an appropriate response.Find the sum of the series 
by expressing 
as a geometric series, differentiating both sides of the resulting equation with respect to x, and replacing x by 
.
A. 
B. 
C. 
D. 
Discuss the equation and graph it.r = 
A. hyperbola, directrix perpendicular to
the polar axis 
unit right of the pole
vertices (
, 0), (- 
, ?)
B. ellipse, directrix parallel to
the polar axis 
unit below the pole
vertices (
, 
), (
, 
)
C. hyperbola; directrix parallel to
the polar axis 
unit above the pole
vertices (
, 
), (- 
, 
)
D. ellipse, directrix perpendicular to
the polar axis 
unit left of the pole
vertices (
, 0), (
, ?)
A $680,000 property is depreciated for tax purposes by its owner with the straight-line depreciation method. The value of the building y, after x months of use is given by 
dollars. After how many months will the value of the building be $377,000? Round your answer to the nearest whole number of months.
?
A. 587 months B. 378 months C. 168 months D. 209 months E. 419 months
Find the absolute value.
A. -18
B. 0
C. 18
D. - 