Suppose $80,000 is invested into an account where interest is compounded semiannually. After 30 years the balance is $398,716. What was the interest rate as a percent? Round the answer to the nearest hundredth of a percent. Interest Rate \approx \boxed{} %
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Since interest is compounded semiannually, there are 2 compounding periods per year. Therefore, over 30 years, there are a total of 30 * 2 = 60 compounding periods. Show more…
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