In paragraphs, a stated main idea is called the topic sentence. In an article, the stated main idea is called the thesis statement. When the author does not state the main idea directly, it is called an implied main idea.
A girl with whom Elie works next to at a warehouse at Buna.
You do 50•10 which is 500 so in this case 500 has the same value as 50 tens.
Quite frankly, it would be a mess. Countries with out immigration would not exist. The United States itself was made by immigrants, therefore, the US wouldn't exist. Everyone would have just stayed in either Europe, Africa, or Asia, and then it would be overpopulated.