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.