Final answer:
The expression 8-^4 . 8^6 is equivalent to 8^2.
Step-by-step explanation:
The expression 8-^4 . 8^6 is equivalent to 8-4 * 86. We can simplify this expression by multiplying the bases (8) and adding the exponents (-4 and 6). When we multiply the bases, we get 8-4+6 which simplifies to 82. Therefore, the expression 8-^4 . 8^6 is equivalent to 82.