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$15,000 invested at 5% for 40 years

Future value

$105,600

Interest earned

$90,600

Total growth

603.999%

Investing $15,000 at 5% compounded annually for 40 years grows to $105,600. That's $90,600 of compound interest earned on your original $15,000.

FV = $15,000 × (1 + 5%)^40

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