chapter 6.5 Making Connections
there are 3 application of log function :
1. pH scale http://www.elmhurst.edu/~chm/vchembook/184ph.html
2. Decibel scale http://hyperphysics.phy-astr.gsu.edu/hbase/sound/db.html
3. Richter scale http://www.sosmath.com/algebra/logs/log5/log56/log56.html
those are really good websites that help me to understand it. However, Ms. Joanne Ho did a pretty good work in explaining the applications. :)
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