1. **State the problem:** A student must attend at least 160 days but not more than 200 days to meet attendance requirements. 2. **Write the inequality:** Let $d$ be the number of days attended. The inequality is $$160 \leq d \leq 200.$$ This means the attendance days $d$ must be greater than or equal to 160 and less than or equal to 200. 3. **Evaluate the given attendance days:** - For 150 days: Since $150 < 160$, this does not meet the requirement. - For 190 days: Since $160 \leq 190 \leq 200$, this meets the requirement. - For 206 days: Since $206 > 200$, this does not meet the requirement. **Final answer:** - 150 days: Does not meet attendance requirement. - 190 days: Meets attendance requirement. - 206 days: Does not meet attendance requirement.