Final answer:
To determine how much each of the three friends pays, we divide the total bill with tip ($109.35) by 3, resulting in each friend paying $36.45.
Step-by-step explanation:
The question involves calculating the total amount three friends need to pay when they split a bill evenly.
Since the total bill, including tip, is $109.35, each friend would pay an equal share of this amount.
To find out how much each friend pays, we divide the total amount by 3:
Total bill including tip: $109.35
Number of friends: 3
Amount each friend pays: $109.35 ÷ 3
= $36.45
Therefore, each friend will pay $36.45 to cover their share of the dinner bill including tip.