First, converting R percent to r a decimal
r = R/100 = 9%/100 = 0.09 per year,
then, solving our equation
A = 2860(1 + (0.09 × 3)) = 3632.2
A = $ 3,632.20
The total amount accrued, principal plus interest,
from simple interest on a principal of $ 2,860.00
at a rate of 9% per year
for 3 years is $ 3,632.20.