1. **State the problem:** We want to estimate the number of adult residents who voted in the last city election based on survey data. 2. **Analyze the surveys:** - Survey 1: 25 homeowners, 15 voted. - Survey 2: 25 adult residents randomly selected, 11 voted. - Survey 3: 25 senior residents, 13 voted. 3. **Choosing the best survey:** The best survey should represent the entire adult population, not just a subgroup like homeowners or seniors. 4. **Calculate proportions of voters in each survey:** - Survey 1: $\frac{15}{25} = 0.6$ - Survey 2: $\frac{11}{25} = 0.44$ - Survey 3: $\frac{13}{25} = 0.52$ 5. **Conclusion for part (a):** Survey 2 is the best because it randomly samples adult residents from the entire city, representing the whole population. 6. **Estimate number of voters in the city (part b):** Use the proportion from Survey 2: $0.44$ 7. **Calculate estimated voters:** $$\text{Estimated voters} = 0.44 \times 22900 = 10076$$ **Final answer:** (a) The survey of 25 adult residents randomly selected from the city. (b) Estimated number of adults who voted: 10076