Final answer:
The number of buses in an AC system can vary depending on the specific context and requirements of the transit system.
Step-by-step explanation:
The number of buses in an AC system would depend on the specific context. However, based on the information given, we can provide examples of the number of buses needed for different scenarios.
For a one-hour one-way route operating on a 15-minute schedule, this would require 4 buses in service in each direction of the route.
For a metropolitan transit system running 50 routes with 8 buses per route, the system would need to charge a total of 400 buses over 6 hours.
It's important to note that these examples may not represent the exact number of buses in an AC system. The actual number would depend on various factors such as the size of the transit system and its specific requirements.