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## #1 2014-07-07 21:07:08

burgess
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Registered: 2014-06-26
Posts: 49
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### A problem on logorithms

Needed help to solve calculus 1 problem

How many number of digits present 5pow20, if log2 = 0.301?

What is the procedure to solve these kind of problems?

Thanks

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## #2 2014-07-07 23:35:44

Agnishom
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From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,442
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### Re: A problem on logorithms

Digits in 5^20 = floor(log(5^20))+1= floor(20*log(5))+1

By the way, what is your favorite color?

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.

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## #3 2014-07-21 23:01:40

burgess
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Registered: 2014-06-26
Posts: 49
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Hi Agnishom,