Question

Let me know if you know the answer to this thank you​

Answer 1

We know

$\boxed{\sf \dfrac{a^m}{a^n}=a^{m-n}}$

$\\ \sf\longmapsto \dfrac{1\times 10^{-5}}{2\times 10^{-1}}$

$\\ \sf\longmapsto 0.5\times 10^{-5-1}$

$\\ \sf\longmapsto 0.5\times 10^{-6}$

$\\ \sf\longmapsto 5\times 10^{-7}$