1. The problem asks for the answer to question 4, which is: $$0 \div (-9)^2 \times 11^2$$ 2. First, calculate the exponents: $$(-9)^2 = 81$$ $$11^2 = 121$$ 3. Substitute these values back into the expression: $$0 \div 81 \times 121$$ 4. Division and multiplication are performed from left to right. First, divide 0 by 81: $$\frac{0}{81} = 0$$ 5. Now multiply the result by 121: $$0 \times 121 = 0$$ 6. Therefore, the final answer to question 4 is: $$0$$