Answer
$6.0\times10^{13}$
Work Step by Step
Using the laws of exponents and the concepts of scientific notation, the given expression, $
(3\times10^5)(2\times10^8)
$, simplifies to
\begin{array}{l}
(3\cdot2)\times10^{5+8}
\\\\
6.0\times10^{13}
.\end{array}