Respuesta :

LammettHash

I assume you just have to simplify the expression.

[tex]\dfrac{(4\times 10^{-5}) + (2 \times 10^{-5})}{3\times10^7} = \dfrac{6\times10^{-5}}{3\times10^7} = \boxed{2\times 10^2}[/tex]