Factor.x4 - 18x2 + 81
A. x2(x - 9)2
B. (x2 - 9)2
C. (x2 + 9)2
D. prime
Answer: B
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 
A. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: parabolas 
B. Domain: all points in the xy-plane except y = 0; range: real numbers z ? 0 ; level curves: parabolas 
C. Domain: all points in the xy-plane; range: all real numbers; level curves: parabolas 
D. Domain: all points in the xy-plane except y = 0; range: all real numbers; level curves: parabolas 
Use the Huntington-Hill apportionment principle to decide who is most deserving of an additional representative. The Artist's Association has 5 representatives from the Painter's Group, which has 220 members, 11 representatives from the Actor's Association, which has 670 members, and 7 representatives from the Sculptor's Association, which has 460 members.
A. Actor's Association B. Sculptor's Association C. Painter's Group
Add: 16.2 + 0.256 + 3 + 2.035
A. 24.56 B. 0.021491 C. 21.491 D. 18.494
Add or subtract. Express the answer as a mixed number.8
+ 5
A. 5
B. 13
C. 14
D. 14