An enzyme lowers the activation energy of a reaction from $90\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$ to $45\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$ at $310\mathrm{K}$ with equal pre-exponential factors. Calculate the power of ten $x$ in $k_{cat}/k_{uncat}=10^x$, to one decimal. Use $R=8.314\mathrm{J}\mathrm{mo}{\mathrm{l}}^{-1}{\mathrm{K}}^{-1}$ and $2.303$ for $\ln 10$.

Numerical answer type, tolerance 0.05.