How did new railroads and improvements in
railway technology spur economic growth?

Explanation:

Buiding a railroad :

- Shortened distances

- it  made travel faster and safer from the US East coast to the West coast

- it  reduced time needed to move merchandises and other good, thus increasing trade

- It allowed to improve communication between distant regions.

the first forms of writing came from them in the form of pictographs around 3100 bc.

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.