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April 5th, 2018, 12:06 PM  #1 
Newbie Joined: Apr 2018 From: Israel Posts: 5 Thanks: 0  Logarithms with e
I'm learning logarithms and i have a problem with this: 500 X e 2.5 I know that the solution is 41.04 But how to do that? 
April 5th, 2018, 12:19 PM  #2 
Senior Member Joined: Aug 2012 Posts: 1,999 Thanks: 573  
April 5th, 2018, 01:51 PM  #3 
Math Team Joined: May 2013 From: The Astral plane Posts: 1,879 Thanks: 761 Math Focus: Wibbly wobbly timeywimey stuff. 
You have to know that $\displaystyle e \approx 2.71828$. Then plug $\displaystyle 500 ~ e^{2.5}$ into the calculator. If you are using a scientific calculator you can plug in 500 (times) exp (2.5) Dan Addendum: Maschke for psychic of the year for figuring out the formula the OP meant by that. 
April 5th, 2018, 08:39 PM  #4 
Newbie Joined: Apr 2018 From: Israel Posts: 5 Thanks: 0 
Many thanks! I got it. And I know now another useful site. 
April 6th, 2018, 12:09 PM  #5 
Math Team Joined: May 2013 From: The Astral plane Posts: 1,879 Thanks: 761 Math Focus: Wibbly wobbly timeywimey stuff.  
April 6th, 2018, 12:49 PM  #6 
Senior Member Joined: May 2016 From: USA Posts: 1,122 Thanks: 464 
More insane


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