Question

The express the expression 6×10 to the -7÷3×10 to the -3rd is equivalent to what?

Answer 1

$(6\times10^{-7})\div(3\times10^{-3})=\dfrac{6\times10^{-7}}{3\times10^{-3}}=\dfrac{6}{3}\times10^{-7-(-3)}=2\times10^{-7+3}\\\\=\boxed{2\times10^{-4}}\\\\Used:\\\\\dfrac{a^n}{a^m}=a^{n-m}$