Isaac invested $5000 at two different rates, 4% and 6.5% if his total interest income was $250, how

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Isaac invested $5000 at two different rates, 4% and 6.5% if his total interest income was $250, how much did he invest at each rate?

Using our split fund calculator, we have the following investments per fund:
Fund 1: $3,000
Fund 2: $2,000