To evaluate \( \log_3 26 \) using the change of base formula, we can use:
\[ \log_b a = \frac{\log_k a}{\log_k b} \]
For this case, we can choose \( k = 10 \) (common logarithm). Thus,
\[ \log_3 26 = \frac{\log_{10} 26}{\log_{10} 3} \]
Next, we can utilize a calculator to find \( \log_{10} 26 \) and \( \log_{10} 3 \):
- \( \log_{10} 26 \approx 1.414973 \) (approximately)
- \( \log_{10} 3 \approx 0.477121 \) (approximately)
Now we can plug these values into our formula:
\[ \log_3 26 \approx \frac{1.414973}{0.477121} \approx 2.965 \]
Now, rounding to the nearest thousandth, we get:
\[ \log_3 26 \approx 2.965 \]
To fill in the responses:
- To evaluate using the change of base formula, divide \( \log_{10} 26 \) by \( \log_{10} 3 \).
- \( \log_3 26 \approx 2.965 \).