Before the construction of the trans continental railway, how were people expected to travel across the united states

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Astorage company rents square storage units by the area of the unit. which graph shows the relationship between the area (x) of a storage unit and the length of its side (y)?

With state which alliance promoted goals and protection of the united states and which alliance promoted goals and protection of the soviet union. site and explain evidence from each primary source to support your answers.