River math: A river flows 1,280 miles from its source (elevation of 4,318ft) to empty into the Gulf of Mexico. What is the gradient of this river? Please epain how you got the awnser

This map shows the member states of the european union (eu). based on this map, what is the most likely reason the eu was formed? a) to increase trade between european nations b) to protect themselves from foreign enemies c) to begin the process of forming one large nation d) to isolate europe from the rest of the international community j