After making a payment, a person is left with a credit card balance of $315. How much interest will be charged after 18 months if the interest rate is 1.5% per year? *
18months = 1.5years
Therefore,
"Interest= {principal \u00d7 rate \u00d7 time \\over 100}"
"={315 \u00d71.5\u00d71.5 \\over 100}"
"=$7.09"
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