# 0.25^x = 0.05

Discussion in 'Community' started by oldschool, Aug 24, 2005.

1. ### oldschool macrumors 65816

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Sep 30, 2003
#1
0.25^x = 0.05

i can't for the life of me remember how to do this...can someone enlighten me?

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Sep 30, 2003
3. ### clayj macrumors 604

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visiting from downstream
#3
You mean, aside from using a calculator program to type in

.25 [x^y] <insert number here> <ENTER>

and figuring out that x = 2.16 something?

4. ### swiftaw macrumors 603

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#4
take logs of both sides:

x ln(0.25) = ln(0.05)

thus x = ln(0.05) / ln(0.25) = 2.16.....

### Staff Member

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#5

6. ### clayj macrumors 604

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#6
Yup, swiftaw's right. This works exactly. (Sobs silently as realization kicks in that much of my high school math classes have been forgotten...)

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8. ### Hoef macrumors 6502a

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Houston, TX..... (keep walking)
#8
The question really is, why do you need to know?

9. ### Abstract macrumors Penryn

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Location Location Location
10. ### CompUser Guest

#10
Seriosuly, I'm in going into 9th grade and I knew how to do that and I'm not like a genious (although I do get As in math).

11. ### neildmitchell macrumors 6502a

Joined:
May 21, 2005
#11
I AM SO GLAD I AM GOING TO ART SCHOOL!

Ok so I am working on a joke and I am totally not a joke maker, so come up with your best punch line for this.

Q: How many creatives does it take to do math?
A:

12. ### clayj macrumors 604

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visiting from downstream
#12
A: It really doesn't matter... they all come up with different answers no matter how many you have.

13. ### oldschool thread starter macrumors 65816

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Sep 30, 2003
#13
i just couldn't remember i was supposed to log....totally forgot.

and i need it so as to solve a genetics problem

14. ### neildmitchell macrumors 6502a

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May 21, 2005
#14
Thats a good one

15. ### Shaun.P macrumors 68000

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#15
Learn the laws of logs and you might not find this as difficult.

16. ### mpw Guest

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Jun 18, 2004
#16
Don't think I ever knew.

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washington dc
#17
interesting that even though we're all such 'computer nerds' when it comes to math, we still have such different educational backgrounds and interests

18. ### AmigoMac macrumors 68020

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l'Allemagne
#18
I really thought about something really crazy running in this thread, but...
Disappointment.

19. ### joecool85 macrumors 65816

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#19
Are you that poor at grammar?

20. ### zelmo macrumors 603

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Jul 3, 2004
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Mac since 7.5
#20
Think of "maths" as the British equivalent of our American word mathematics. He didn't use bad grammer, he just lives in a different country. Ease up.

21. ### ejb190 macrumors 65816

#21
Logs - that's what you get when you cut down trees. Right?

<The Botany Guy ducks>

22. ### mpw Guest

Joined:
Jun 18, 2004
#22
Isn't mathematics Latin?
While there may laws of logs (I've already admitted to not being science of mathss minded) there are no laws to grammer. Don't think of grammar as laws or rules, just suggestions or guidelines.

23. ### oldschool thread starter macrumors 65816

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Sep 30, 2003
#23

kelsey wrote the grammer laws.

24. ### dubbz macrumors 68020

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#24
Only type of 'log' I know is the log generated by various computer programs.

25. ### emw macrumors G4

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Aug 2, 2004
#25
Keep in mind that in the USA, we often refer to the basics of education as the 3 "Rs"