Find a general term an for the geometric sequence.a4 = - 
, a9 = 
A. an = 4 
n-1
B. an = 6 
n-1
C. an = 
n-1
D. an = 4 
n-1
Answer: A
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Solve the problem.If the given figure goes through a 90° clockwise rotation about P, followed by a 90° counterclockwise rotation of the resulting figure about Q, find the final image.
A. 
B. 
C. 
D. 
Use Chebyshev's theorem to solve the problem.In a certain distribution of numbers, the mean is 50 and the standard deviation is 6. What can you say about the fraction of numbers that lie between 32 and 68?
A. at most 
B. at most 
C. at least 
D. at least 
Find the center, foci, and vertices of the ellipse.36x2 + 9y2 = 324
A. center at (0, 0)
foci at (- 3
, 0) and (3
, 0)
vertices at (-6, 0), (6, 0)
B. center at (0, 0)
foci at (0, 6) and (3, 0)
vertices at (0, 36) and (9, 0)
C. center at (0, 0)
foci at (0, - 3
) and (0, 3
)
vertices at (0, -6), (0, 6)
D. center at (0, 0)
foci at (0, -6) and (0, 6)
vertices at (0, -36), (0, 36)
Rewrite the given expression using an appropriate variable. Use the first letter of the given word as the variable.99 - (Years)
A. Y ÷ 99 B. 99 ? Y C. 99 - Y D. 99 + Y