Answer
$3.64 \times 10$
Work Step by Step
Write each number in scientific notation to obtain:
$=(9.1 \times 10^4)(4 \times 10^{-4})$
Multiply 9.1 and 4 together and the powers of 10 together to obtain:
$=36.4 \times 10^{4+(-4)}
\\=36.4 \times 10^0
\\=36.4 \times 1
\\=36.4
\\=3.64 \times 10$
