The surface area of the prism is composed of 6 squares with a side length of 8.5 cm.
The area of each square is computed as follows:
[tex]\begin{gathered} A=\text{side}^2 \\ A=8.5^2 \\ A=72.25 \end{gathered}[/tex]
Therefore, the surface area of the prism is 6*72.25 = 433.5 cm²
