plz help i don't uderstand i will give brianlist i beg

Answer:
The formula, I=PRT is used to calculate simple interest.
I=Interest
P=Principal
R=Interest Rate
T=Time
In this case, P=500, R=3%, T=9 months.
Multiplying this out, we obtain a final interest of 135 dollars.
Let me know if this helps.
Answer:
The formula, I=PRT is used to calculate simple interest.
Step-by-step explanation: