Can i get with this question? and can i get an explanation on how to do it so i can do the others? : )

So to start you start with what you know. Which is the 2,500 miles the distance in between the two. Then 1 mile= 1.6 kilometers. So you need the answer in kilometers so you need to cross out miles. So put miles on the bottom. Then multiply the two. 

Hope this helps.

The volume is 56.8 triangular the