Alicia borrowed 15000 to buy a car. she borrowed the money at 8% for 6 years. what is the interest she will pay for the loan

The answer is $7,200

Why? So you have to use I=prt (Intrest=principle*rate*time) and were trying to find the interest so it stays as 'I' but we have the other numbers so it'd be I=15,000*.08*6 (8% is .08 because the rate must be in decimal or fraction form). Solve it and your answer should be I= 7,200.