Respuesta :
[tex]\bf ~~~~~~ \textit{Simple Interest Earned}\\\\
I = Prt\qquad
\begin{cases}
I=\textit{interest earned}\\
P=\textit{original amount deposited}\to& \$3500\\
r=rate\to 12\%\to \frac{12}{100}\to &0.12\\
t=years\to &3
\end{cases}
\\\\\\
I=3500\cdot 0.12\cdot 3[/tex]