A microbial culture (following Monod model for growth) has a maximum specific growth rate of $0.1 \mathrm{~h}^{-1}$, Monod constant of $1 \mathrm{mg} \mathrm{L}^{-1}$ and endogenous decay rate of $0.1$ day $^{-1}$. At limiting substrate concentration of $23 \mathrm{~g} \mathrm{~L}^{-1}$, the net specific growth rate will be $\_\_\_\_\_\_$ day ${ }^{-1}$. (rounded off to one decimal place)
