Answer
$2.4\times10^{10}$
Work Step by Step
We start with the given expression: $(3\times10^5)(8\times10^4)$
We apply the commutative and associative properties of multiplication to rearrange the terms: $(3\times8)(10^5\times10^4)$
We multiply the coefficients: $24(10^5\times10^4)$
To multiply powers with the same base, we add the exponents: $24\times10^{4+5}=24\times10^9$
We rewrite in scientific notation: $2.4\times10^{10}$
