Which describes the United States after the American Civil War? A) a united nation with slavery only in the South
B) a united nation with no slavery
C) two nations, one with slavery and one without
D) a united nation with a new system of government

 I think the answer is D, but I am not sure.

Explanation:

Hope this help !

the answer to your question is C.

on this day in 1913, henry ford installs the first moving assembly line for the mass production of an entire automobile. his innovation reduced the time it took to build a car from more than 12 hours to two hours and 30 minutes.

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34