The formula is given by:
[tex]A=Pe^{rt}[/tex]Where
[tex]\begin{gathered} P=\text{ the initial amount} \\ A=\text{the final amount} \\ r=\text{ the rate of interest} \\ t=\text{ time} \end{gathered}[/tex]In this case,
[tex]\begin{gathered} r=13\%=0.13,P=\$396,t=3 \\ \text{ Therefore,} \\ A=396\cdot e^{0.13\cdot3}\approx\$584.88 \end{gathered}[/tex]Therefore, the investment will be worth $584.88 after 3 years.
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