How do you calculate log_5 (18)? Precalculus Properties of Logarithmic Functions Common Logs 1 Answer Shwetank Mauria Apr 12, 2018 log_5 18=1.7959 Explanation: Let log_nm=x then n^x=m and taking log to the base 10 on each side xlogn=logm i.e. x=logm/logn i.e. we can write log_nm=logm/logn or log_5 18=log18/log5=1.2553/0.6990=1.7959 Answer link Related questions What is the common logarithm of 10? How do I find the common logarithm of a number? What is a common logarithm or common log? What are common mistakes students make with common log? How do I find the common logarithm of 589,000? How do I find the number whose common logarithm is 2.6025? What is the common logarithm of 54.29? What is the value of the common logarithm log 10,000? What is log_10 10? How do I work in log_10 in Excel? See all questions in Common Logs Impact of this question 2645 views around the world You can reuse this answer Creative Commons License