Final answer:
The total area of the flag is 269 square inches, which is the sum of the 234 in² of green fabric used and the 35 in² of yellow fabric left over.
Step-by-step explanation:
To determine the total area of the flag, Rainey's group needs to add the area they know they used for the green fabric to the area of the yellow fabric they have left. They used 234 in² of green fabric and have 35 in² of yellow fabric left. Therefore, the total area of the flag can be calculated by adding these two areas together:
Total area = Area of green fabric + Area of yellow fabric left
Total area = 234 in² + 35 in²
Total area = 269 in²
Thus, the total area of the flag is 269 square inches.