When you are multiplying exponents with the same base, you can add the exponents. This is represented as:
[tex]x^a \cdot x^b = x^{(a +b)}[/tex]
In our case we are multiplying exponents with the same base 8 and exponents -7 and 5. The sum of -7 and 5 is -2, so our answer is [tex]\boxed{8^{-2}}[/tex].
