To expand the logarithm \( \ln(13x) \), we can use the properties of logarithms. Specifically, the property that states \( \ln(ab) = \ln(a) + \ln(b) \).
Here, we have:
\[ \ln(13x) = \ln(13) + \ln(x) \]
So the expanded form is:
\[ \ln(13) + \ln(x) \]
Thus, the correct response is:
\[ \ln(13) + \ln(x) \]
If you were given multiple-choice options, the correct answer from the ones listed would be:
\(\ln 13 + \ln x\) (or equivalent to that representation if formatted differently).