Final answer:
In the city, you should use your turn signal at least 100 feet before making a turn. In the country, you should use your turn signal at least 50 feet before making a turn.
Step-by-step explanation:
In a city, you should use your turn signal at least 100 feet before making a turn. This gives other drivers enough time to react and adjust their driving accordingly. In the country, where there might be fewer vehicles and less traffic, you should still use your turn signal, but you may not need to signal as far in advance as in the city. Consider using your turn signal at least 50 feet before making a turn in rural areas.