according to the graph, how many years does it take for the number of atoms of carbon-14 in an organism to decrease to half their original number?

5,370 years

Explanation:

I cannot see a graph in your answer, but I assume that the answer would be the same either way as carbon 14's half life is 5,370 years

I hope this helped

b) the confederacy had to pay all union war expenses.

- a government ruled by the people, or assembly. officials monarchy - a single ruler like a king. over time some city-states, like athens would change governments. what this means is that all the citizens voted on all the laws.