How do you evaluate log_7 49? Precalculus Properties of Logarithmic Functions Common Logs 1 Answer A. S. Adikesavan Mar 20, 2016 2 Explanation: log _a a = 1 and log (a^m) = m log a.. log_7 49 = log_7 (7^2) = 2 log_7 7 = 2 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 4250 views around the world You can reuse this answer Creative Commons License