The expression \(2.5x + 10\) can be broken down as follows:
- \(2.5x\) represents the total cost of individual entry fees for \(x\) number of people (where \(2.5\) is the cost per person).
- \(10\) represents the entry fee for the car.
Given this breakdown, the correct interpretation is:
The entry fee for the car was $10.00.
So, the accurate choice is: The entry fee for the car was $10.00.