Answer:
612 in.²
Step-by-step explanation:
total surface area = area of the bases + lateral area
Each base is a triangle, so the area of the bases is the sum of the area of the two triangles.
The net of the lateral area is a rectangle that has dimensions the perimeter of the base and the height of the prism.
total surface area = 2 × bh/2 + PH
total surface area = 2 × 9 in. × 12 in. / 2 + (9 in. + 12 in. + 15 in.) × 14 in.
total surface area = 108 in.² + 504 in.²
total surface area = 612 in.²
