To calculate the surface area of a rectangular prism, you can use the formula:
\[ SA = 2(lw + lh + wh) \]
where:
- \( l \) is the length,
- \( w \) is the width,
- \( h \) is the height.
Given:
- Length (\( l \)) = 12 inches
- Width (\( w \)) = 5 inches
- Height (\( h \)) = 3 inches
Now plug in the values:
\[ SA = 2(12 \times 5 + 12 \times 3 + 5 \times 3) \]
Calculating each term inside the parentheses:
\[ 12 \times 5 = 60 \] \[ 12 \times 3 = 36 \] \[ 5 \times 3 = 15 \]
Now add these results together:
\[ 60 + 36 + 15 = 111 \]
Now multiply by 2 for the surface area:
\[ SA = 2 \times 111 = 222 \text{ square inches} \]
Therefore, the surface area of the rectangular prism is \( 222 \) square inches.
The correct response is: 222 square inches