Use the chart titled "Population Growth in New York City, 1800-1890" to answer the following question:

Between 1800 and 1890, the population of New York City

decreased by more than three-quarters

increased more than two million

decreased by less than two million

fell by more than half

Which four of these developments were made under mongol rule during the pax mongolica? the extension of the grand canal in china the spread of christianity the spread of weapons that used gun powder the invention of new medicines the establishment of a postal system the invention of geometric models of lunar motion

American troops were worried about cantracting in cuba a. yellow fever b. hepatitis c. polio

According to the qianlong emperor, why was china not interested in importing anything else?