An IDF curve is given as $i=\frac{a}{(T_d+10{)}^c},$ where $i=$ rainfall intensity $($in$/$hr$)$ and $T_d=$ rainfall duration $($min$).$ The coefficients $\text{'}a\text{'}$ and $\text{'}c\text{'}$ are determined by a linear regression $($red dashed line$)$ in the form of $log(i)=-clog(T_d+10)+log(a)$ performed using oberved data $($circle$)$ as shown in the graph.

Compute the rainfall intensity $($in$/$hr$)$ when a rainfall duration is $0\mathrm{.}34$ hours. Write the answer up to two decimal places $($like $3\mathrm{.}21)$ without unit.