Answer
From Q1, $log 20 = 1.30$,
From Q3, $ln 20 = 3.00$
Using the relationships, $logx=0.43429lnx$ and $lnx=2.3026logx$
$log20=0.43429\times ln20=0.43429\times 3.00=1.30$ which is correct.
Also, $ln20=2.3026\times log20=2.3026\times1.30=3.00$ which is also correct.
Hence, double check is done.
Work Step by Step
From Q1, $log 20 = 1.30$,
From Q3, $ln 20 = 3.00$
Using the relationships, $logx=0.43429lnx$ and $lnx=2.3026logx$
$log20=0.43429\times ln20=0.43429\times 3.00=1.30$ which is correct.
Also, $ln20=2.3026\times log20=2.3026\times1.30=3.00$ which is also correct.
Hence, double check is done.
