Answer:
8
Explanation:
Divide 80 by 10, and you will get 8.
When they ask you to fund the unit rate, it will typically be in some sort of measurement or price (pounds, inches, dollars, miles, etc.). They want you to find out how much one individual item would be, whether it's how much money, or how many inches, etc.
In this case, they want you to find the average amount of snow fallen in one day. Since it has been 10 days and 80 inches were dropped, you would divide the total amount of inches by the total amount of days in order to find how many inches were dropped in just one day.