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Topic: Did I do this right?  (Read 2709 times)

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Offline dmblove26

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Did I do this right?
« on: February 23, 2014, 03:31:36 PM »
find the log of 2.48 * 10 ^-8

I ended up with 0.000000004?

Does anyone have any clear instructions on how to find the log of a number using the calculator. What are the steps? I have to explain them to someone and I'm bad at explaining things.
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Offline Arkcon

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Re: Did I do this right?
« Reply #1 on: February 23, 2014, 05:59:11 PM »
That's not the number I get when I enter "2.48 * 10 ^-8" into Google's online calculator, either Log10 or natural logarithm.  Given the definition of logarithm, given here: http://en.wikipedia.org/wiki/Logarithm, your answer doesn't seem to be correct -- for example, 10 raised to the 0.000 000 004 isn't 0.000 000 002 48.
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Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline DrCMS

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Re: Did I do this right?
« Reply #2 on: February 24, 2014, 04:21:27 AM »
Do you want (log 2.48)x10-8 or log (2.48x10-8).  You have the answer for the 1st not the 2nd
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