Determine two pairs of polar coordinates for the point with 0° ? ? < 360°.(0, - 
)
A. (
, 0°), (- 
, 180°)
B. (
, 270°), (- 
, 90°)
C. (
, 90°), (- 
, 270°)
D. (
, 90°), (- 
, 0°)
Answer: B
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Find the standard quota asked for. Round your answer to two decimal places if necessary.The table below gives the populations of four districts A, B, C, and D, among which a total of 60 seats are to be apportioned. 
Find the standard quota for District A.
A. 2.09 B. 28.50 C. 9000 D. 4300
Determine the center, foci, and vertices of the ellipse.
+ 
= 1
A. center at (0, 0)
foci at (0, 9) and (2, 0)
vertices at (0, 81), (4, 0)
B. center at (0, 0)
foci at (0, -9) and (0, 9)
vertices at (0, -81), (0, 81)
C. center at (0, 0)
foci at (- 
, 0) and (
, 0)
vertices at (-9, 0), (9, 0)
D. center at (0, 0)
foci at (0, - 
) and (0, 
)
vertices at (0, -9), (0, 9)
Simplify the complex fraction.
A. 12
B. 
C. 1
D. 
Solve the system of equations by the substitution method. Check your solutions. For any dependent equations, write your answer in the ordered pair form.
A. {(-6, -8)} B. {(-6, 8)} C. {(6, 8)} D. {(6, -8)}