Final answer:
To convert the car travel distance from miles to kilometers, multiply the miles by the conversion factor of 1.609 kilometers/mile. The correct answer is a) kilometers. The same conversion factor can be used to convert the air travel distance from miles to kilometers.
Step-by-step explanation:
To convert the distance traveled by Cristine Lynn from miles to kilometers, we can use the conversion factor 1 mile = 1.609 kilometers.
Given that her car travel is 250 miles, we can multiply it by the conversion factor to find the distance in kilometers:
250 miles * 1.609 kilometers/mile = 402.25 kilometers.
Therefore, the correct answer is a) kilometers.
To convert the air travel of 400 miles to kilometers, we can multiply it by the same conversion factor:
400 miles * 1.609 kilometers/mile = 643.6 kilometers.
So the correct answer is also a) kilometers.