Answer
$0.00000019$
Work Step by Step
RECALL:
(i) Scientific notation has the form $a(10^n)$, where $1 \le a \lt 10$ and where $n$ is an integer.
(ii) $\frac{a^{m}}{a^{n}}=a^{m-n}$
Write each number in scientific notation to obtain:
$=\dfrac{5.7(10^{-3})}{3(10^{4})}$
Divide $5.7$ and $3$ together and the powers of 10 together to obtain:
$=\dfrac{5.7}{3} \cdot \dfrac{10^{-3}}{10^{4}}
\\=1.9 \cdot 10^{-3-4}
\\=1.9(10^{-7})
\\=0.00000019$
