How did railroads affect where people settled in the united states?

Helen is a u. s. citizen and cpa, who moved to london, england three years ago to work for a british company. this year, she spent the entire year in london and earned a salary of $110,000. how much of her salary will she be allowed to exclude from gross income in the u. s.

The impact of science and technology on international relations

As of 2013, the world’s total population was about