Jawabanmu

2014-09-06T09:22:00+07:00
Log 2 = 0,3010
80:2 = 40
jadi
log 80 = 0,3010×40
log 80 = 12,12




2014-09-06T14:35:01+07:00
Log80= log(2.2.2.10)= log2+log2+log2+log10= 0,3010+0,3010+0,3010+1= 1,9030