Find the domain of the rational expression. 
A. {x|x is a real number and x ? -9}
B. {x|x is a real number}
C. {x|x is a real number and x ? 9 and x ? 5}
D. {x|x is a real number and x ? 9}
Answer: D
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Make a preference table for the given voting situation.Eight voters are asked to rank 4 brands of ice cream: A, B, C, and D. The eight voters turn in the following ballots showing their preferences in order: 
Make a preference table for these ballots.
A. 
B. 
C. 
D. 
Multiply.(x2 - x - 9)(x - 1)
A. x3 - 2x2 - 8x + 9 B. x3 - 2x2 - 10x - 9 C. x3 - 8x + 9 D. x3 - 2x2 - 9x + 9
Solve the problem.A ball is thrown downward from a window in a tall building. Its position at time t in seconds is 
where s is in feet below the window. How long (to the nearest tenth) will it take the ball to fall 111 feet?
A. 1.8 sec B. 2.6 sec C. 3.2 sec D. 1.6 sec
Rationalize the denominator. Assume that no radicands were formed by raising negative numbers to even powers. 
A. 
B. 
C. 
D. 