Respuesta :

[tex]\begin{gathered} \text{Interest}=\text{Amount}-\text{pricipal} \\ I=11349-7800 \\ I=3549 \\ So, \\ I=\frac{\text{PRT}}{100} \\ 3549=\frac{7800\times R\times7}{100} \\ R=6.5\text{ \%} \end{gathered}[/tex]

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