What is the value of expression?

5^−8 • 5^−4

A. 5^32

B. 5^4

C. 5^−4

D. 5^−12


Sagot :

5 ^ ( - 8 - 4 ) = 5 ^ ( - 12 ) D.
[tex]Use:a^n\cdot a^m=a^{n+m}\\\\5^{-8}\cdot5^{-4}=5^{-8+(-4)}=5^{-12}\\\\Answer:\boxed{D}[/tex]