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------------------------------------------------ Generally, it is recommended to rotate the tires on vehicles approximately every _____ miles (8,000 km) or with every oil change.

Select one:
a. 4000
b. 3000
c. 5000
d. 6000

To solve this question, we need to convert 8,000 kilometers to miles and then pick the answer option that is closest to this value.

1. Understand the Conversion Rate:
- 1 kilometer is approximately equal to 0.621371 miles.

2. Convert Kilometers to Miles:
- Multiply the number of kilometers by the conversion factor:
[tex]\[
8000 \, \text{kilometers} \times 0.621371 \, \text{miles/kilometer} = 4970.968 \, \text{miles}
\][/tex]

3. Select the Closest Option:
- Review the given options: 4000, 3000, 5000, 6000.
- Compare each option to 4970.968 miles to find the closest value.
- 5000 is the closest number to 4970.968.

Therefore, the recommended mileage for rotating tires is approximately 5,000 miles. The correct answer is c. 5000.