Why must old currency be taken out of circulation when new currency is made?

Is karma the same as destiny, in the sense that everything that happens to you is predetermined? do you believe that "what goes around comes around," and if so is this the same as karma? does everyone get what they deserve, in the end?

Which of the following acts or treaties tried to american indians?

Based on this article, what can you infer about the role of religion in the civil war in sudan? respond in three to five sentences. use details from the article to support your statement.