I’m not sure about all, so I’m going to answer the ones that I’m sure.
El río Mississippi
El Golfo de México
Answer: The two major geographic features provided on the east and west boundaries of piece of land are:
1. The land is "Louisiana Purchase".
2. The east boundary is "Mississippi".
3. The west boundary is "The Rockies".
Explanation: The Louisiana purchase is a piece of land of about 530,000 acres which was sold by France to the US President which was Thomas Jefferson in 1804.
The answer will be 261.8 because the tenths are the 1st digits after the decimal points which rounds up the 9s to the the 80 but you don’t have to include the zero on the final answer
