[tex]\bf \left.\qquad \qquad \right.\textit{negative exponents}\\\\
a^{-{ n}} \implies \cfrac{1}{a^{ n}}
\qquad \qquad
\cfrac{1}{a^{ n}}\implies a^{-{ n}}
\qquad \qquad
a^{{{ n}}}\implies \cfrac{1}{a^{-{{ n}}}}\\\\
-------------------------------\\\\
3.2\cdot 10^{-4}\implies 3.2\cdot \cfrac{1}{10^4}\implies \cfrac{3.2}{10^4}\implies \cfrac{3.2}{10000}\implies 0.00032~\ \textless \ ~1[/tex]
