Solve the problem.If f(x) = cos x and f(a) = - 
, find the exact value of f(a) + f(a - 2?) + f(a + 4?).
A. - 
B. - 
C. -12
D. -36
Answer: A
Mathematics
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Provide an appropriate response.Use a calculator to find: ln 189 Round to thousandths.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve the problem.n! =
A. n × (n - 1)! B. n! + (n - 1)! C. n! × (n - 1)! D. n + (n - 1)! E. none of these
Mathematics
Simplify.
A. 
B. 
C. 
D. 
Mathematics
Find the specified domain and express it in interval notation.For f(x) = x2 - 81 and g(x) = 2x + 3, what is the domain of 
(x)?
A. All real numbers
B. 
C. (-?, -9) ? (-9, 9) ? (9, ?)
D. 
? 
Mathematics