Final answer:
The minimum distance to see both ways to make a U-turn is 50 meters.
Step-by-step explanation:
To make a safe U-turn, you need to have a clear view of oncoming traffic in both directions. The minimum distance required to see both ways before making a U-turn depends on the speed of the cars and their distance from you. According to the information provided, Bridget, who is watching a straight stretch of road from her classroom window, notices that it takes most cars 3 seconds to travel from one pole to another, which are 50 meters apart. Therefore, the minimum distance to see both ways to make a U-turn is 50 meters.