What do the four stars on the center of the arkansas state flag represent

The four stars on the Arkansas state flag represent the four governments that have ruled over the territory that currently comprises Arkansas. Those countries are Spain, France, "the Confederate States", and the United States.

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.