Find the center, foci, and vertices of the ellipse.64x2 + 25y2 = 1600
A. center at (0, 0)
foci at (0, - 
) and (0, 
)
vertices at (0, -8), (0, 8)
B. center at (0, 0)
foci at (- 
, 0) and (
, 0)
vertices at (-8, 0), (8, 0)
C. center at (0, 0)
foci at (0, 8) and (5, 0)
vertices at (0, 64) and (25, 0)
D. center at (0, 0)
foci at (0, -8) and (0, 8)
vertices at (0, -64), (0, 64)
Answer: A
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A. - 
B. 
C. 
D. - 
Solve the problem.The five sales people at Southwest Appliances earned commissions last year of $15,000, $24,000, $44,000, $20,000, and $29,000. Find the mean commission.
A. $27,720 B. $29,040 C. $26,400 D. $25,080
Find the distance between two points given their coordinates.Find the distance between points R and S on a number line, with coordinates -4 and -7, respectively.
A. d(R, S) = 11 B. d(R, S) = -11 C. d(R, S) = 3 D. d(R, S) = -3
Solve the equation by the square root property.x2 = 225
A. {±15i} B. {±15} C. {15} D. {112.5}