For consumers, pizza and hamburgers are substitutes. A rise in the price of a pizza causes in the equilibrium price of a hamburger and in the equilibrium quantity of hamburgers.

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answer: a federal government has final authority on interstate/inter provincial  and international affairs, a confederation is one where the central/national government or authority is governing body what does not have final say over the same matters. hopefully this and i will try again if you don't like this answer : )

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answer; list;