SOLUTION: use long8 5=0.7740 and log8 4=0.6667 to evaluate log8 20??

Algebra ->  Equations -> SOLUTION: use long8 5=0.7740 and log8 4=0.6667 to evaluate log8 20??      Log On


   

Question 309751: use long8 5=0.7740 and log8 4=0.6667 to evaluate log8 20??
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
log%288%2C5%29+=+0.7740
log%288%2C4%29+=+0.6667
--------------------------
evaluate log%288%2C20%29
20 = 4*5 --> log(20) = log(4) + log(5) with any base
log%288%2C20%29+=+0.774+%2B+0.6667
= 1.4407