Find the domain of the function.f(x) = x2 + 8
A. {x|x ? -8}
B. {x|x > -8}
C. all real numbers
D. {x|x ? -8}
Answer: C
Mathematics
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+ 
- 8
A. Yes; 3x5 + 5x3 - 8 B. No
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Solve the problem.In the study of alternating electric current, capacitive voltage is given byVc = - 
cos 2?ft,where f is the number of cycles per second, i is the maximum current, and t is the time in seconds. Solve the equation for t.
A. t = 2?f arccos 
B. t = 2?f cos 
C. t = 
arccos 
D. t = 
arccos 
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Translate the expression into the language of algebra. Use the variable x to represent the number.Four times a number
A. 4x B. x + 4 C. 1 + 4x D. 4 - x
Mathematics
Write nine hundred thirty-six in standard form.
A) 396 B) 936 C) 693 D) 639 E) 369
Mathematics