Question 261435
Not sure what equation to use, but lets say
{{{I = PRT}}}
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10% over 5 years
{{{I = P(.10*5)}}}
{{{I = .5P}}}
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15% for 3 years 
{{{I = P(.15*3)}}}
{{{I = .45P}}}
---
5% for 10 years
{{{I = P(.05*10)}}}
{{{I = .5P}}}