[tex] \bf (3.7\times 10^{-9})^2\implies \stackrel{\textit{distributing the exponent}}{(3.7^2\times 10^{-9\cdot 2})}\implies 13.69\times 10^{-18}
\\\\\\
\boxed{1.369\times 10^1}\times 10^{-18}\implies 1.369\times 10^{1-18}\implies 1.369\times 10^{-17} [/tex]
