dimahalsarray33 dimahalsarray33

09-04-2021
Mathematics

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Find the interest rate for a bank account that earned $81.60 in interest over 4 years and that had a principal of $510

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shristi1283 shristi1283

11-04-2021

Answer:

[tex]si = \frac{p \times t \times r}{100} \\ 81.60 = \frac{510 \times 4 \times r}{100} \\ 8160 = 2040r \\ r = \frac{8160}{2040} \\ r = 4\%[/tex]

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