Answer
$4 \times 10^{-7}$
Work Step by Step
Convert each number to scientific notation to find:
$=\dfrac{8 \times 10^{-5}}{2 \times 10^{2}}$
Divide the corresponding parts to find:
$=(8 \div 2) \times (10^{-5} \div 10^{2})
\\=4 \times 10^{-5-2}
\\=4 \times 10^{-7}$
