Perform the indicated operation and, if possible, simplify. Assume that all variables represent positive real numbers. 
(
+ 4
)
A. 
- 44
B. 
+ 44
C. 
- 4
D. 
+ 4
Answer: B
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Express the following in terms of u and v, where u = ln x and v = ln y. For example, 
ln 
A. 6 v - 11 u
B. 
C. 6 u - 11 v
D. 