Answer :

naǫ
[tex]\frac{6 \times 10^{-3}}{3 \times 10^{-8}}=\frac{6}{3} \times \frac{10^{-3}}{10^{-8}}=2 \times 10^{-3-(-8)}=2 \times 10^{-3+8}=2 \times 10^5= \\ \\ =2 00 ,000[/tex]

The answer is C.