When did the fourth of july become a federal holiday?

How are the three economic questions answered in a traditional economic system

Which best explains why many american indian chiefdoms came to an end within a few years of hernando de soto’s arrival in georgia?

Sandra lives in the heart of a large city. lately, there have been robberies on several of the streets near where sandra lives but none on her street. sandra and her neighbors believe that they have not seen any crime on their street because they know each other, notice when strangers or strange cars are in the neighborhood, and have a mix of old retired couples and young families who use the neighborhood at different times of the day. jane jacobs would see this as an example of: