Answer:
143 in^2
Step-by-step explanation:
This is a rectangular prism, not a cube. One way in which to find the total surface area is as follows: find the area of the top, the front and the side, add these together and multiply by 2 (since there are 2 tops, 2 sides, 2 fronts):
Surface area = 2(5*7 + 5*9 + 9*7) in^2 = 2(35 + 45 + 63) in^2 = 143 in^2
