## College Algebra (6th Edition)

$8.2\times10^{7}$
$$(2\times10^{4})(4.1\times10^{3})$$ Regroup like terms, then simplify: $$=(2\times4.1)(10^{4}\times10^{3})$$ $$=8.2\times10^{(4+3)}$$ $$=8.2\times10^{7}$$