Answer: 941.33 square inches
Explanation:
Given : The side length of square = 26 inches
Area of square =


Also, it given that one side of the square is also the diameter of the semicircle.
i.e. diameter = 26 inches
Radius = half of diameter = 13 inches
Then , the area of the semicircle =


Now, the total area of the banner = Area of square +Area of semicircle

Hence, the total area of the banner= 941.33 square inches