Step 1:
Write interest (I) formula
[tex]\begin{gathered} I\text{ = }\frac{Prt}{100} \\ P\text{ = principal = \$200} \\ \text{r = rate = 9\%} \\ t\text{ = time = 3 years} \end{gathered}[/tex]Step 2
[tex]\begin{gathered} \text{I = }\frac{200\text{ }\times\text{ 9 }\times\text{ 3}}{100} \\ I\text{ = \$54} \end{gathered}[/tex]Final answer
I = $54
