Answer:
Interest: $390 | Total: $715
Step-by-step explanation:
To answer the first question, we can use the simple interest formula provided:
[tex]I=Prt[/tex]
P = initial balance
r = annual interest rate
t = time
First, change 8% into the decimal form:
8% -> [tex]\frac{8}{100}[/tex] -> 0.08
Now, plug in the values:
[tex]I=325(0.08)(15)[/tex]
[tex]I=390[/tex]
Charlie made $390 of interest. To find the total, just add that number to $325.
[tex]390+325=715[/tex]
Charlie's total money made was $715.