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You have invested in a company that sells invisibility cloaks. By investing $10,000 in the “Ron Weasley” bond, you obtained an interest payment of $388.25 after 1 year. Find the mathematical model that gives the interest I for this municipal bond after 1 year in terms of the amount invested P. (note: the simple interest on an investment is directly proportional to the amount of the investment)

I=P (give your answer in the exact decimal form)