Answer:
[tex]\boxed{\text{672 mi}^{2}}[/tex]
Step-by-step explanation:
The formula for the surface area of a rectangular prism is
S = 2(lw + lh + wh)
Data:
l = 12 mi
w = 12 mi
h = 8 mi
Calculations:
2(Top + Bottom) = 2lw = 2 × 12 × 12 = 288 mi²
2(Front + Back) = 2lh = 2 × 12 × 8 = 192 mi²
2(Left + Right) = 2wh = 2 × 12 × 8 = 192 mi²
Total area = 672 mi²
The surface area of the rectangular prism is [tex]\boxed{\textbf{672 mi}^{2}}[/tex]
