Answer:
Step-by-step explanation:
The formula for determining simple interest is expressed as
I = PRT/100
Where
I represents interest paid on the amount of money borrowed.
P represents the principal or amount of money borrowed.
R represents interest rate
T represents the duration in years.
From the given information,
P = $450
R = 5%
T = 1 year
I = (450 × 5 × 1)/100
I = $22.5
the total amount that she pays for the Soundsystem is
450 + 22.5 = $472.5