Answer:
[tex]\large\boxed{2.47\times10^{-3}=0.00247}[/tex]
Step-by-step explanation:
METHOD 1:
[tex]\text{Use:}\ 10^{-n}=\dfrac{1}{10^n}\\\\2.47\times10^{-3}=2.47\times\dfrac{1}{10^3}=2.47\times\dfrac{1}{1000}=\dfrac{2.47}{1000}\\\\=\dfrac{2.47\times100}{1000\times100}=\dfrac{247}{100000}=0.00247[/tex]
METHOD 2:
[tex]a\times10^n\\\\\text{If}\ n<0\ \text{then move the comma n places to the left.}\\\text{If}\ n>0\ \text{then move the comma n places to the right.}[/tex]
[tex]\text{Therefore}\ 2.47\times10^{-3}=0\underbrace{.002}_{\leftarrow3}47[/tex]
