Which of the following statements best describes environmental changes caused by westward railroad expansion?

Need it now explain gorbachev’s policy of glasnost. how did this policy change the soviet union?

Profits are maximized when marginal revenue and marginal costs are a. set c. equal b. less than market price d. greater than market price

In 1816, john c. calhoun proposed that: a. that the federal government aid in the construction of roads and canals to improve transportation to and from the west b. the united states should end slavery. c. the united states should increasing the size of the navy and invade central america. d. the united states should annex hawaii