Find the domain of the function.f(x) = x - 
A. (-?, -6) ? (-6, ?)
B. (-?, ?)
C. (-?, 5) ? (5, ?)
D. (-?, -6) ? (-6, 5) ? (5, ?)
Answer: A
Mathematics
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Solve the proportion.
= 
A. 
B. 
C. {45}
D. {1628}
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Solve the problem.For a culture of 30,000 bacteria of a certain strain, the number of bacteria N that will survive x hours is modeled by the formula N = 3000
. After how many hours will 27,000 bacteria survive?
A. 73 hr B. 19 hr C. 91 hr D. 81 hr
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Solve the problem.If sin ? = 
, find csc ?.
A. 3
B. 
C. - 
D. undefined
Mathematics
Solve the problem.If u = < -5, 7 > and v = < 6, 6 >, and w = < -11, 2 >; evaluate u ? (v + w).
A. 71 B. 62 C. 89 D. 81
Mathematics