Answer:
The given expression can be simplified using the rule for multiplying powers with the same base by adding their exponents.
(9^-3)(9^12) can be written as (1/9^3)(9^12)
Now, using the rule of adding exponents, (1/9^3)(9^12) can be simplified as 9^(12-3) = 9^9.
Therefore, the expression (9^-3)(9^12) simplified as 9^9.
Explanation: