#.01

... why we add N. Most of you have access to a hand calculator with a LOG base 10 function. You might satisfy yourself that the LOG base 10 of #1 is zero, of #10 is one, of #100 is two, etc. You can also note that the LOG base 10 of #.1 is minus one, of #.01 is minus two, etc. If we express X in exponential form and remember that the LOG (any base) of one is zero, we have: 100 = 1 * 10EXP(2); LOG(100) = 2 10 = 1 * 10EXP(1); LOG(10) = 1 1 = 1 * 10EXP(0); LOG(1) = 0 .1 = 1 * 10EXP(-1); LOG(.1) = -1 .01 = ...