Question

Surface area of prisms

Answer 1

12x12=144. Answer is 144 miles

Answer 2

Answer:

$\boxed{\text{672 mi}^{2}}$

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 $\boxed{\textbf{672 mi}^{2}}$