Simplify.
7-^8 x 7-^4
A. 1/7^4
B. 7^12
C. 1/7^12
D. 7^32

Answer:
C
Step-by-step explanation:
7^-8 x 7^-4 = 7^(-8-4) = 7^(-12) = (1/7)^12 = 1/7^12