Answer:
I = $1,215
Step-by-step explanation:
Principal (P ) = $3,000
interest rate (R ) = 4.5% or 0.045
time (in years) ( t )= 9
Use the simple interest formula:
I = P × r × t
I = $3,000 × 0.045 × 9
I = $1,215
Therefore, the simple interest earned on a $3,000 investment after 9 years is $1,215.