Final answer:
To find the surface area of a right rectangular prism, find the area of each face and add them together.
Step-by-step explanation:
The surface area of a right rectangular prism can be found by finding the area of each face and adding them together. In this case, the prism has 6 faces. The area of the top and bottom faces is length times width, which is 5 times 5 = 25. The area of the front and back faces is length times height, which is 5 times 2 = 10. The area of the left and right faces is width times height, which is 5 times 2 = 10. Therefore, the expression that represents the surface area of the prism is 25 + 25 + 10 + 10 + 10 + 10 = 80.