How do you condense # log 250 + log 4#? Precalculus Properties of Logarithmic Functions Common Logs 1 Answer MeneerNask Mar 21, 2016 You use the rule #logaxxb=loga+logb# in reverse Explanation: #->log250+log4=log(250xx4)=log1000# #=log10^3=3log10=3log_10 10=3xx1=3# 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 5994 views around the world You can reuse this answer Creative Commons License