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Mathematics 21 Online
OpenStudy (anonymous):

A mother wants to invest $13,000 for her children's education. She invest a portion of the money into a bank certificate of deposit (CD Account) which earns 4% and the remainder in a savings bond which earns 7%. if the total interest earned after one year is $780, how much money was invested at each rate? How much money was invested in the CD account? How much money was invested in the saving bonds?

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