Question 132625
The general rule is:
{{{log(a) + log(b) = log(a*b)}}}
Note that:
{{{8*log(10) = log(10) + log(10) + log(10) + log(10) + log(10) + log(10)
+ log(10) + log(10)}}}
Following the general rule,
{{{8*log(10) = log(10*10*10*10*10*10*10*10)}}}
{{{log(10*10*10*10*10*10*10*10) = log(10^8)}}}
This is saying "What is the exponent to the base 10 which gives 
me {{{10^8}}}? The question answers itself. 
{{{8*log(10) = 8}}}
Another way to look at it is {{{log(10)}}} is asking me: "What is the
exponent to the base 10 which gives me {{{10^1}}}? The
answer is obviously {{{1}}}
and {{{8*log(10) = 8*1}}}
{{{8*1 = 8}}}