Answer: [tex]124 \frac{1}{4} \text{ in}^2[/tex]
Step-by-step explanation:
The surface area of a rectangular prism with height [tex]h[/tex], width [tex]w[/tex] and length [tex]l[/tex] is [tex]2(lw+lh+wh)[/tex].
Therefore, the surface area is [tex]2(3.25 \cdot 5+3.25 \cdot 5.25 +5 \cdot 3.5)=124 \frac{1}{4} \text{ in}^2[/tex]