Answer
$\ln(x^{3}y^{4})$
Work Step by Step
$ 3\ln x+4\ln y=\qquad $...apply the Power Rule: $\qquad \log_{b}(M^{p})=p\cdot\log_{b}\mathrm{M}$
$=\ln x^{3}+\ln y^{4}\qquad $...apply the Product Rule: $\qquad \log_{b}(MN)=\log_{b}\mathrm{M}+\log_{b}\mathrm{N}$
$=\ln(x^{3}y^{4})$
