Hydrology

In Horton's infiltration capacity equation $f_t = f_c + (f_0 - f_c) e^{-k t}$, the initial infiltration capacity is $f_0 = 10.0\text{ cm/h}$, ultimate steady infiltration capacity is $f_c = 2.0\text{ cm/h}$, and the decay constant is $k = 1.20\text{ h}^{-1}$. The infiltration capacity $f_t$ at $t = 2.0\text{ hours}$ in $\text{cm/h}$ is ________ (round off to 2 decimal places).