1. **State the problem:** Don, Nicole, and Todd complete a 39.1-mile bicycle relay race in 2.06 hours. We need to find their average speed in miles per hour (mi/hr). 2. **Formula:** Average speed is calculated by dividing total distance by total time: $$\text{Average speed} = \frac{\text{Total distance}}{\text{Total time}}$$ 3. **Apply the formula:** $$\text{Average speed} = \frac{39.1}{2.06}$$ 4. **Calculate the division:** $$\frac{39.1}{2.06} = \frac{\cancel{39.1}}{\cancel{2.06}} \approx 18.97$$ 5. **Round the result:** Rounded to the nearest tenth, the average speed is: $$19.0 \text{ mi/hr}$$ 6. **Answer:** The average speed of the team is 19.0 mi/hr.