Solve the problem.If f(?) = cos ? and f(a) = - 
, find the exact value of f(a) + f(a - 2?) + f(a + 4?).
A. -12
B. -36
C. - 
D. - 
Answer: C
Mathematics
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A. (8 - t)(1 + t2) B. (1 + t)(8 - t2) C. (8 + t)(1 - t2) D. (1 - t)(8 + t2)
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Find the common ratio for the geometric sequence.3, 
, 
, 
, 
, . . .
A. r = 4
B. r = 3
C. r = 
D. r = 
Mathematics
Multiply.3(2r + 7 + 2s)
A. 6r + 7 + 6s B. 6r + 21 + 6s C. 6r + 7 + 2s D. 6r + 21 + 2s
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Change the given quantity to the indicated unit.8 L ? 
qt
A. 8.8 B. 7.2 C. 0.8 D. 10.4
Mathematics