1. **State the problem:** We need to find the difference in the estimated lengths of two alligators. The length is estimated by measuring the distance from the eyes to the nose and then multiplying that distance by 12. 2. **Identify the given distances:** - Alligator 1: 17.5 cm - Alligator 2: 15 cm 3. **Calculate the estimated lengths:** - Length of Alligator 1 = $17.5 \times 12 = 210$ cm - Length of Alligator 2 = $15 \times 12 = 180$ cm 4. **Find the difference in lengths:** $$210 - 180 = 30$$ cm 5. **Conclusion:** The difference in the estimated lengths of the two alligators is 30 cm.