[tex]\bf ~~~~~~ \textit{Simple Interest Earned Amount}\\\\
A=P(1+rt)\qquad
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{original amount deposited}\to& \$918.78\\
r=rate\to 2.1\%\to \frac{2.1}{100}\to &0.021\\
t=years\to &10
\end{cases}
\\\\\\
A=918.78(1+0.021\cdot 10)\implies A=918.78(1.21)[/tex]
