Question 113687
Usinng this formula : 
logb2=0.310, 
logb3=0.4771
logb5=0.6990 
solve:
log5 135 and rounded 4 decimals
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log5 135 = log(135)/log(5) = log(5*3^3)/log(5)
= [log5 + 3log3]/log5

= [0.6990 + 3*0.4771]/[0.6990]

= 3.0476
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Cheers,
Stan H.