Final answer:
The question concerns safe driving habits and ensuring visibility to other drivers when attempting to turn around on a hill or in a curve. The distance is unspecified, but local traffic laws generally provide guidance on the required visibility distance.
Step-by-step explanation:
The subject of the question relates to safe driving practices, focusing on the importance of not attempting to turn around on a hill or within a curve when visibility is limited. The distance mentioned in the question is meant to ensure that other drivers can clearly see the car to avoid any potential accidents. Although the question does not specify the exact distance in feet, as a tutor, I would suggest that the student refer to local traffic laws as these distances can vary depending on the jurisdiction or country. Typically, the recommended distance might be several hundred feet, ensuring that oncoming traffic has enough visibility and time to react to the car's presence.