Find the domain and range of the function.f(x) = -7 cot2 x
A. Domain: x ? n?, for all integers n; range [0, ?)
B. Domain: x ? 
+ n?, for all integers n; range [0, ?)
C. Domain: x ? n?, for all integers n; range (-?, 0]
D. Domain: x ? 
+ n?, for all integers n; range (-?, ?)
Answer: C
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Solve.If y varies directly as x, and y = 3 when x = 2, find y when x = 8.
A. 
B. 12
C. 
D. 
Simplify.
A. 
B. 2m7p2
C. 
D. 2mp
Solve.There are n people in a room. The number N of possible handshakes by all the people in the room is given by the function N(n) = 
. For what number n of people is 28 ? N ? 325 ?
A. {n|9 ? n ? 25} B. {n|8 ? n ? 26} C. {n|7 ? n ? 28} D. {n|10 ? n ? 25}
Solve the problem.The formula A = 137e0.044t models the population of a particular city, in thousands, t years after 1998. When will the population of the city reach 186 thousand?
A. 2008 B. 2007 C. 2006 D. 2005