Answer:
3 x 10^3
Explanation:
The first is to identify the operation to be performed, it is a quotient between two potency.
Being two potency of the same base number (10), the property says that the quotient of two potency of the same base subtracts its exponent, and the base remains the same.
The corresponding exponents are 8 and 5.
The subtraction is 8-5 = 3.
The whole number that accompanies the base is divided in a current way, that is 12/4. Therefore, the result is 3.