Which of the following are results of people moving to the suburbs? poor people are left in central cities. rich people move into the cities. more cars are needed. smog decreases. traffic in and out of the city decreases.

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation:

4 copper and gold, the california gold rush is why im pretty sure.