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April 5th, 2018, 12:06 PM   #1
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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?
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April 5th, 2018, 12:19 PM   #2
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https://www.wolframalpha.com/input/?i=500+x+e%5E(-2.5)
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April 5th, 2018, 01:51 PM   #3
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Math Focus: Wibbly wobbly timey-wimey 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.
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April 5th, 2018, 08:39 PM   #4
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Many thanks!

I got it.

And I know now another useful site.
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April 6th, 2018, 12:09 PM   #5
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Math Focus: Wibbly wobbly timey-wimey stuff.
Quote:
Originally Posted by Myriam View Post
Many thanks!

I got it.

And I know now another useful site.
Welcome to the club! We're more or less insane, but very nice, people.

-Dan
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April 6th, 2018, 12:49 PM   #6
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More insane
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