Answer:
answer is d 600
Explanation:
You have to multiply 2 by 3 to get the height by 3 to get the 3 boxes height stacked together. Now you do 15x6 to get the in^2 for that one side and multiply it by to since there are 2 sides like that which gives you 180. Now you do 6x10 to get another side done and multiply that by 2 to get the other side like it. That is 120. Add the 2 together and you are at 300. Now you have to do 15x10 to get the top part of the box. Multiple that by 2 and you have the bottom as well. So now you have 300+150+150. Add the 2 150's and you have 300+300=600 in^2. I was confused a but at first so don't feel to bad about it.