Final answer:
2) 9%, Approximately 9% of United States exports went to countries that were part of free-trade agreements in 2015.
Step-by-step explanation:
In 2015, approximately 9% of United States exports went to countries that were part of free-trade agreements.
For the United States, the most well-known regional trading agreement is the North American Free Trade Agreement (NAFTA), which involves trade between the United States, Canada, and Mexico. Additionally, the United States participates in other regional trading agreements, such as the Caribbean Basin Initiative and a free trade agreement with Israel.
These agreements allow for reduced tariffs and trade barriers, promoting economic cooperation and exports to countries involved in the agreements.