Answer:
382.5 square inches
Step-by-step explanation:
The surface area of a 3D object is the sum of the area of all of the surfaces. Therefore, the surface area of this prism is:
[tex]9\cdot 13.5 + 2(\dfrac{1}{2} \cdot 10\cdot 9)+ 9\cdot 9 + 10\cdot 9= 382.5[/tex] square inches.
Hope this helps!
