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Mathematics, 20.01.2022 01:00 lilkari5

An executive invests $21,000, some at 8% and the rest at 7% annual interest. If he receives an annual return of $1,570, how much is invested at each rate?

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An executive invests $21,000, some at 8% and the rest at 7% annual interest. If he receives an annua...
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