Question 20 Evaluate $\ln (0.509)$. Give your answer to 4 decimal places. \[ \ln (0.509)= \] Question Help: Video Message instructing

Step 1 ：To solve this problem, we need to use a calculator as the natural logarithm of a number is not easily calculable by hand.

Step 2 ：Using a calculator, we find that \(\ln (0.509) \approx -0.6755\).

Step 3 ：So, the natural logarithm of 0.509, to 4 decimal places, is \(\boxed{-0.6755}\).