Answer:
$960
Explanation:
You are going to want to use the simple interest formula for this. The one below is modified for solving the interest earned.

I = interest amount
P = principal amount
r = interest rate (decimal form)
t = time
The first step is to change 3% into a decimal:
3% ->
-> 0.03
Now, lets plug in the values into the equation:


Jameson will be charged $960 of interest after 4 years.