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$3,000 invested at 3% for 30 years

Future value

$7,282

Interest earned

$4,282

Total growth

142.726%

Investing $3,000 at 3% compounded annually for 30 years grows to $7,282. That's $4,282 of compound interest earned on your original $3,000.

FV = $3,000 × (1 + 3%)^30

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