Find a map (web-search or library) and determine the distance between the eastern margin of north america , say, new york city , and the western margin of africa , say senegal or sierra leone.
the distance is? .
convert distance to kilometers (there are 1.6 km for every mile) 


3848,75 miles, 6158 km.

Explanation:

From New York, USA, to Dakar, Senegal (the outmost western city in Senegal), according to a map the distance is 6158 km. If there are 1.6 km for every mile, then to get the quantity in miles we should divide 6158 km by 1.6, which gives us 3848,75. However, the distance depends a lot on the exact point in a map from which we calculate.

the only other powers were germany russia and uk and they were too busy fighting each other wearing each other down   that the us was becoming strong and they were becoming weaker