Respuesta :

Answer:

B

Step-by-step explanation:

using the rule of exponents

[tex]a^{m}[/tex] × [tex]a^{n}[/tex] = [tex]a^{(m+n)}[/tex] , then

[tex]8^{5}[/tex] × [tex]8^{4}[/tex] = [tex]8^{(5+4)}[/tex] = [tex]8^{9}[/tex]