Answer:
300 in²
Step-by-step explanation:
The surface area of a prism is found using the following formula: SA = 2(lh+lb+bh). This formula takes the area of each face (6 in total( and adds them together to find a total sum. Substitute l = 12, b = 9 and h = 2 to solve for the surface area.
SA = 2(lh+lb+bh)
SA = 2(12*2+12*9+9*2)
SA = 2(24 + 108 + 18)
SA = 2(150)
SA = 300
