Plz help asap!!!!!! Thank you

[tex]The\ scientific\ notation:\\\\a\cdot10^n,\ a\in[1,\ 10)\ and\ n\in\mathbb{Z}[/tex]
[tex]0.\underbrace{00001}_{5}276\ m=\dfrac{1.276}{1\underbrace{00,000}_{5}}\ m=\dfrac{1.276}{10^5}\ m=1.276\cdot10^{-5}\ m\\\\Use\ a^{-n}=\dfrac{1}{a^n}[/tex]