Arkansas and Louisiana
The question is a bit confusing. Since there is only one state and one river named Mississippi, I can't think of a use for a plural form of the noun.If, for some reason you would have a use for a plural form, it would be two Mississippis. The plural possessive form would be the two Mississippis' border.
MS
jackson
at the gulf of mexica
14ft
26*25 = 650
Namibia's two letter abbreviation code is NA. IT is a country in the south of Africa.
Please rephrase - the question is unclear.
yes
Marsha Blackburn
Vicksburg National Military Park