## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$1.296\times10^{22}$
Using the laws of exponents and concepts of scientific notation, the given expression, $(2.4\times10^5)(5.4\times10^{16}) ,$ simplifies to \begin{array}{l}\require{cancel} (2.4\cdot5.4)\times10^{5+16} \\\\= 12.96\times10^{21} \\\\= 1.296\times10^{22} .\end{array}