How do you use the Change of Base Formula and a calculator to evaluate the logarithm log_8 77log877? Precalculus Properties of Logarithmic Functions Functions with Base b 1 Answer Alan N. Jun 12, 2018 log_8 77 approx 2.08893log877≈2.08893 Explanation: log_a b = ln b/ln alogab=lnblna :. log_8 77 = ln 77/ln 8 approx 4.34381/2.079442 approx 2.08893 Check: 8^2.08893 approx 77.00 Answer link Related questions What is the exponential form of log_b 35=3? What is the product rule of logarithms? What is the quotient rule of logarithms? What is the exponent rule of logarithms? What is log_b 1? What are some identity rules for logarithms? What is log_b b^x? What is the reciprocal of log_b a? What does a logarithmic function look like? How do I graph logarithmic functions on a TI-84? See all questions in Functions with Base b Impact of this question 3850 views around the world You can reuse this answer Creative Commons License