It seems okay to me (if that what your asking) I don't know this subject very well ut the part your working on " I'm familiar with ?" Don't be surprised if I was wrong buuuuut it does look okay to me "(the answer)".
The answer would be 8.7639
What type of math is this??? Geometry? Algebra?
D. You multiply all measurements together. The thickness has nothing to do with how much air will be inside. (: hope this helped ya :)
