As I can see from the map Ohio is under number seven, Columbia is under number two, while Mississippi is under number 5, which leaves number 4 to Missouri.
The easiest way to conclude this is to see positions of Mississippi and Missouri as these two rivers are connected and are forming one of the largest water systems in the world.
Explain the reason for having an equator and a prime meridian. how do these two lines us to navigate our world? describe your opinion in at least two to three sentences.