Answer:
39 ft²
Explanation:
I assume the base is a square 3 ft by 3 ft, and the height of each triangular side is 5 ft.
SA = s² + 4 × bh/2
SA = (3 ft)² + 4 × (3 ft)(5 ft)/2
SA = 9 ft² + 30 ft²
SA = 39 ft²
If my assumption is incorrect, then the correct answer will be different, but I don't have a figure that I can see.