To calculate this, break up the interest into four pieces and put them to the power of n. That is
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0.67 percent
$491
13.96%
It is 1.135^2 - 1 = 28.8%
It makes a difference how often the interest is compounded, and you haven't given that information. If it's compounded annually, then your 10,000 becomes 12,762.82 after 5 years. If it's compounded quarterly, then it becomes 12,820.37 . If it's compounded "daily", then it becomes 12,840.03 . If it's "simple" (uncompounded) interest, then 10,000 swells to a full 12,500 in 5 years.