Composition of Functions Practice Test

A sound sensor models intensity by $g(x)=10^x$ and converts to decibels with $f(I)=10\log_{10}(I)$. Based on the scenario, what is $f(g(3))$?

A culture grows as $g(t)=500\cdot 2^{t/3}$ and analysis uses $f(x)=\ln(x)$. Using the function defined, what is $f(g(6))$?​