How do you evaluate #log0.0081#? Precalculus Properties of Logarithmic Functions Common Logs 1 Answer A. S. Adikesavan Nov 25, 2016 #-2.091515#, nearly Explanation: #log(0.0081)=log ((81)(10^-4))=log ((3^4)(10^-4))# #=4 log 3-4 log 10 =4(log3-1)=-2.091515#, nearly = direct value, from the calculator. 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 3564 views around the world You can reuse this answer Creative Commons License