Answer: [tex]\frac{s^8t^4}{r^{12}}[/tex]
Step-by-step explanation:
By the Negative exponent rule, you know that:
[tex]a^{-1}=\frac{1}{a}[/tex]
And by the Power of a power property, you also know the following:
[tex](a^m)^n=a^{mn}[/tex]
Therefore, applying the above, you can simplify the given expression [tex](r^{-3}s^2t)^4[/tex]. Then you get:
[tex](r^{-3}s^2t)^4=r^{-12}s^8t^4 =\frac{s^8t^4}{r^{12}}[/tex]