Question

Choose the option with the proper number of sig figs

Answer 1

$(3\times10^4)(4\times10^{23})$$\begin{gathered} 3\times10^4\times4\times10^{23} \\ 3\times4\times10^4\times10^{23} \\ 12\times10^{4+23} \\ 12\times10^{27} \end{gathered}$

Hence, the correct option is option B