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# Interest and debt

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Compound interest introductionThe rule of 72 for compound interest

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Introduction to interestInterest (part 2)

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Annual percentage rate (APR) and effective APRInstitutional roles in issuing and processing credit cardsPayday loans

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𝑒 and compound interest𝑒 as a limitFormula for continuously compounding interest

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Time value of moneyIntroduction to present valuePresent value 2Present value 3Present value 4 (and discounted cash flow)

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Personal bankruptcy: Chapters 7 and 13