The rule for converting log bases is:
log4(7) = log2(7)/log2(4)
Now 4 = 2 squared so log2(4) = 2
So log4(7) = log4(7)/2 = (1/2)*log2(7)
By the way, the "new and improved" browser now does not accept subscripts or superscripts so I hope you understand this.
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k=log4 91.8 4^k=91.8 -- b/c of log rules-- log 4^k=log 91.8 -- b/c of log rules-- k*log 4=log91.8 --> divide by log 4 k=log 91.8/log 4 k= 3.260
Unfortunately, the browser used by Answers.com for posting questions is incapable of accepting mathematical symbols. This means that we cannot see the mathematically critical parts of the question. We are, therefore unable to determine what exactly the question is about and so cannot give a proper answer to your question.In this question, for example, it is not clear whether the characters immediately after "log" are the bases. Also, it is unclear whether the first "term" is log(3-x) or log(3)-x: both logs to base 4.