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Solve for the value of log 20 without using calculator

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spock5 | Student, Undergraduate | Honors

Posted May 16, 2012 at 6:30 AM via web

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Solve for the value of log 20 without using calculator

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thilina-g | College Teacher | (Level 1) Educator

Posted May 16, 2012 at 9:38 AM (Answer #1)

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`log20 = log(2*(10))`

I assume you are using the base 10 in your log.

According to logarithm laws, we know,

`log(ab) = loga + logb`

Therefore,

`log20 = log2+log10`

From table,

`log20 = 0.3010 + 1`

`log20 = 1.3010`

 

The answer is 1.3010

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