It's hard and I don't know how to do it

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more. b-it made cross-country travel too expensive for ordinary americans. c-it decreased the safety of americans who moved to settle the plains. d-it shortened travel time between the east and west for all americans.

Why did president johnson decide not to run for reelection in 1968?

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)?