Final answer:
To convert 1.4 miles to kilometers, multiply by 1.609. Natalie walked approximately 2.3 kilometers.
Step-by-step explanation:
To convert miles to kilometers, we can use the fact that 1 mile is equal to approximately 1.609 kilometers. In this case, Natalie walked 1.4 miles, so we can multiply this by 1.609 to find the distance in kilometers.
1.4 miles x 1.609 kilometers/mile = 2.2536 kilometers
rounded to the nearest tenth, Natalie walked approximately 2.3 kilometers.