Logarithms

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Emily Oren 3C
Posts: 50
Joined: Fri Sep 29, 2017 7:07 am

Logarithms

Postby Emily Oren 3C » Sat Dec 09, 2017 7:19 pm

Can someone please explain the sig fig rules for logarithms? And why do they make sense? Why can't we just use the number of sig figs in the given numbers in the question?

Emily Glaser 1F
Posts: 156
Joined: Thu Jul 27, 2017 3:01 am

Re: Logarithms

Postby Emily Glaser 1F » Sat Dec 09, 2017 7:33 pm

If he didn't mention it in class, I wouldn't worry about it.

Priscilla Okaiteye
Posts: 61
Joined: Tue Nov 21, 2017 3:02 am

Re: Logarithms

Postby Priscilla Okaiteye » Sun Apr 15, 2018 11:09 pm

You would have to see the number of significant figures in the log(excluding whats beyond the 10^x) and in your answer, that's the number of sig figs to the right of your decimal.

Chem_Mod
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Re: Logarithms

Postby Chem_Mod » Sun Apr 15, 2018 11:22 pm

When you take the log base 10 of some number (i.e. 2.45 * 102), the answer you get is 0.389166..... To get correct sig figs, you would write 2.389. That is because the # to the left of the decimal arises from the power of 10. if you did log base 10 of 2.45 then it's 0.389.


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