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For Tom's savings account, the interest earned varies jointly with the principal and amount of time (in years) since opening the account. If Tom opened the account 3 years ago with $1,200 and earned $144 in interest, how much interest will he have earned 8 years after opening the account?​

User Volk
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Answer: 384 or 528 depending if you have to add the interest he already earned

Explanation:

User Bets
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