Use the information below to determine the cardinality of the set. U = {x | x ? N and x ? 15} A = {x | x ? N and 5 < x < 10} B = {x | x ? N and x is even and x < 14} C = {x | x ? N and 8 ? x ? 13}n(A ? B ? C)
A. 10
B. 9
C. 15
D. 1
Answer: A
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The graph shows sales in thousands of dollars for 1989 and 1990. Use it to answer the question. 
Which month in 2007 had the highest sales?
A. Month 12 B. Month 3 C. Month 5 D. Month 6
State A and state B are each candidates for an extra congressional representative. The relative unfairness of apportionment for state A is approximately 0.35, whereas for state B it is about 0.349. According to the apportionment principle, which of the two states should receive a new representative? Explain why.
a. State B, because it has the smaller relative unfairness b. State A, because it has the smaller relative unfairness. c. State A, because it has the larger relative unfairness. d. State B, because it has the larger relative unfairness.
Use a graphing calculator to find the sum.
+ 
+ 
+ . . . + 
Leave your answer in fractional form.
A. 
B. 
C. 
D. 
Find the vertices of the hyperbola.(y + 4)2 - 4(x - 3)2 = 4
A. (-3, 2) and (-3, 6) B. (-3, -2) and (3, 2) C. (3, -6) and (3, -2) D. (4, -5) and (4, -1)