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 6083 views around the world You can reuse this answer Creative Commons License