Answer:
[tex]\frac{1}{5^{3} }[/tex]
Step-by-step explanation:
Using the rules of exponents
[tex]a^{m}[/tex] × [tex]a^{n}[/tex] ⇔ [tex]a^{(m+n)}[/tex] , [tex]a^{-m}[/tex] = [tex]\frac{1}{a^{m} }[/tex]
[tex]5^{-8}[/tex] × [tex]5^{5}[/tex]
= [tex]5^{(-8+5)}[/tex]
= [tex]5^{-3}[/tex]
= [tex]\frac{1}{5^{3} }[/tex]