Final answer:
Courtney ran at a rate of 6.5 miles per hour, and to calculate the distance she can run in 2 hours in kilometers, the conversion 6.5 mi/h × 1.60934 km/mi gives 10.46071 km/h. Multiplying this by 2 gives approximately 20.9 kilometers, so the closest answer option is 21 km.
Step-by-step explanation:
Courtney ran at a rate of 6.5 miles per hour. To calculate how many kilometers she can run in 2 hours, we must convert miles to kilometers. There are approximately 1.60934 kilometers in one mile.
The conversion calculation would be: Courtney's speed in kilometers per hour (km/h) is 6.5 miles/hour × 1.60934 km/mile. So, to find out how many kilometers she can run in 2 hours, we multiply her speed in km/h by 2.
6.5 mi/h × 1.60934 km/mi = 10.46071 km/h
Then, 10.46071 km/h × 2 hours = 20.92142 km. The answer rounded to the nearest tenth is 20.9 kilometers, which is not listed in the options provided. Since we must select the closest option, 21 km would be the correct choice approximately.