Final answer:
To convert 7,920 miles to feet, you can multiply 7,920 by the conversion factor of 5280 feet per mile, yielding a result of 41,689,600 feet.
Step-by-step explanation:
To convert miles to feet, we can use the conversion factor 1 mile = 5280 feet. Now, let's convert 7,920 miles to feet:
7,920 miles * 5280 feet/mile = 41,689,600 feet
Therefore, the ratio to convert 7,920 miles to feet is 41,689,600 feet.