To solve this problem, we need the simple interest formula:
[tex]A=P(1+rt)[/tex]Replacing using the given values:
[tex]\begin{gathered} A=7000(1+0.02\ast1.5) \\ A=7210 \end{gathered}[/tex]We need to convert 2% to decimal 0.02 and convert 18 months into years.
Now, we need to find the simple interest:
I = A - P
Replacing:
I = 7210-7000
I =