Answer:
$52.50
Step-by-step explanation:
The formula for simple interest is
I= p x r x t, where
I = interest,
p= principal ; $525
r = interest rate ; 20% or 0.2
t =time in years: 180 days, in years = 180/360 = 0.5 years
I = $525 x 0.2 x 0.5
I =$105 x 0.5
i =$ 52.5
Interest = $52.50