Question

log 40 value with describe

Answer 1

Method One: If you know the value of log2
=log40
=log(10x 4)
=log10 + log4
=1 + log(2²)
=1+2log2
=1+2(0.3010)
=1+0.6020
=1.6020

Method 2: By using calculator
=log40
=1.6020


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Answer 2

Since 40 = 2 x 2 x 2 x 5, we can get
log 40 = log 2 + log 2 + log 2 + log 5 so that
log 40 = 1.60206