Question 68938
Since logs undo exponents, we're looking for a number that can raise 10 to get to 100. Lets say we start with {{{10^x=100}}} and we want to find the value of x, we would use logs. 
So {{{log_[10](100)=x}}}
to evaluate type this expression in your calculator and you'll find
{{{x=2}}} since {{{10^2=100}}}