Question 418414
{{{4^x = 10}}}


Take the log base 4 of both sides to obtain


{{{log(4, 4^x) = log(4, 10)}}}


{{{x = log(4, 10)}}}


If you have a calculator that can evaluate logarithms of any base, you're good. If not, you'll have to use the change-of-base formula, i.e. {{{log(4, 10) = log(10)/log(4) = 1/log(4)}}}.