Final answer:
To simplify the expression (r^-3s^2t)^4, you need to raise each term inside the parentheses to the 4th power.
Step-by-step explanation:
To simplify the expression (r-3s2t)^4, you need to raise each term inside the parentheses to the 4th power. Remember that when you raise a power to another power, you multiply the exponents. So, (r-3s2t)4 becomes r-12s8t4.