Please rephrase - the question is unclear.
yes
class project class project
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
at the gulf of mexica
jackson
14ft
Marsha Blackburn
Vicksburg National Military Park
Arkansas and Louisiana
The area of New Mexico is 121,445 sq mi; Mississippi is 47,358 sq mi ...121445 ÷ 47358 = 2.5644 ≈ 2.6(A little more than 2½ Mississippis can fit into New Mexico.)
most of the time 10... 7 mississippis