Question 1176029
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Simple interest -- not compound.<br>
The interest earned is the principal, times the (annual) interest rate, times the number of years.<br>
I = prt<br>
In your example the interest is $229.71, the principal is $1300, and the number of years is 5.7; the unknown is the interest rate r:<br>
{{{229.71 = (1300)(r)(5.7)}}}<br>
{{{r = 229.71/((1300)(5.7))}}}<br>
Use a calculator....<br>