Caroline's bedroom is the shape of a rectangular prism that measures thirteen feet long, ten feet wide, and 9 feet high. What is the surface area of her room?

You can slplit sides up and then add those areas up ... find the areas of each of those sides seperatley and then you can add them up

meaning

2 sides 13*10*2 = 260

2 sides 13*9*2 = 234

2 sides 9*10*2 = 180

so then add all the areas up and you get 674 ft^2