Final answer:
The maintenance cost of a system can vary depending on the type of system and its complexity. In the examples provided, we can see that maintenance costs can be a significant portion of the total cost in some cases.
Step-by-step explanation:
The maintenance cost of a system can vary depending on the type of system and its complexity. In the examples provided, we can see that maintenance costs can be a significant portion of the total cost in some cases. For instance, in the case of a car, the cost of maintenance during the first year is approximately exponentially distributed with a mean of $150. This means that on average, a car owner can expect to spend $150 on maintenance in the first year. In another example, a company planning to service air conditioners in a city needs to budget an average of 1.1 hours per technician. This suggests that maintenance time is an important factor in determining the total cost of the service.