Suppose you have the following project digraph. (The numbers in parentheses represent hours.)
The length of the critical path from B is
A. 13 hours.
B. 18 hours.
C. 21 hours.
D. 5 hours.
E. none of these
Answer: B
Mathematics
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C. 
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A. log 6 7a B. log 12 7a C. log 12 (7 + a) D. log 6 (7 + a)
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