Answer
$r_{y}$=0.03480
Work Step by Step
991.20=$[1000(\frac{0.03375}{2})][\frac{1-(1+\frac{r_{y}}{2})^{-2(10)}}{\frac{r_{y}}{2}}]+1000(1+\frac{r_{y}}{2})^{-2(10)}$
$r_{y}$=0.03480
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