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You invested $\$6,000$ in a savings account, and after $7$ years, the balance grew to $\$9,123.45$. The interest is compounded annually. What is the annual interest rate? Use the formula $A = P(1 + \frac{r}{n})^{nt}$, where $A$ is the balance (final amount), $P$ is the principal (starting amount), $r$ is the interest rate expressed as a decimal, $n$ is the number of times per year that the interest is compounded, and $t$ is the time in years. Round your answer to the nearest tenth.