SOLUTION: (a) Write the expression in terms of natural logarithms. (Express all logarithmic functions in terms of ln(x) in your answer.) log 8.4 (122) = (b) Give a calculator approximati

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: (a) Write the expression in terms of natural logarithms. (Express all logarithmic functions in terms of ln(x) in your answer.) log 8.4 (122) = (b) Give a calculator approximati      Log On


   

Question 469492: (a) Write the expression in terms of natural logarithms. (Express all logarithmic functions in terms of ln(x) in your answer.)
log 8.4 (122) =
(b) Give a calculator approximation (correct to four decimal places).
log 8.4 (122) ~=
This is very new to me and i really need someone to help me figure this one out.Thanks!
Answer by Tatiana_Stebko(1539) About Me  (Show Source):
You can put this solution on YOUR website!
(a) log+%288.4%2C122%29
Use formula log%28b%2Ca%29=log%28c%2Ca%29%2Flog%28c%2Cb%29
The same formula in terms of natural logarithms log%28b%2Ca%29=ln%28a%29%2Fln%28b%29
log+%288.4%2C122%29=ln122%2Fln8.4
(b) log+%288.4%2C122%29=ln122%2Fln8.4=4.8040%2F2.1282=2.2573
Use scientific calculator