Help With Pre-Cal.!

xKingpinx · **Joined:** Aug 2007 **Posts:** 2153 **Location:**

Ok...so I fell asleep during class and missed the whole lecture on how to do these problems. I was wondering if anyone could help me out and kinda explain step by step how to do them. They aren't really difficult at all..but like I said, I missed the entire lecture due to my lack of sleep..so any help would be appreciated.

Here are the problems:

Change each expression to a form involving addition and subtraction of terms by applying the laws of logarithms.

2.log ab^2c
4.log x^a y^b/z
6.log cube root of a^2 b^5

Find the log of each number in the given base
8. log5 28.9
10.log11 77

Evaluate the following problems using logarithms.

12. (871)(4.93)^3/27.4

heroo · **Joined:** Sep 2006 **Posts:** 6618 **Location:**

you're dutch right?

xKingpinx · **Joined:** Aug 2007 **Posts:** 2153 **Location:**

No I'm not. The only dutch I know is Jij hebt seks met ezels. And that's from a tv show hahah. I guess that's not good if the only sentence you can speak in another language is insulting.

heroo · **Joined:** Sep 2006 **Posts:** 6618 **Location:**

hehe lol, which show you got that from? but I always used a Dutch mathsite if I had any troubles with math, but I guess that won't help you. check out google.

[SD]Twysta · **Posted:** Fri Feb 18, 2011 5:47 pm

edit nvm

KillAndChill · **Joined:** Mar 2008 **Posts:** 770 **Location:**

log(a^b) = b*log(a)

log(a*b) = log(a)+log(b)

log(a/b) = log(a)-log(b)

loga(b) = log(b)/log(a)

Shouldn't be hard to do now.

Squirt · **Joined:** Jan 2008 **Posts:** 8186 **Location:**

Geez this should be cake man o.O, don't you have notes?

xKingpinx · **Joined:** Aug 2007 **Posts:** 2153 **Location:**

KillAndChill wrote:

log(a^b) = b*log(a)

log(a*b) = log(a)+log(b)

log(a/b) = log(a)-log(b)

loga(b) = log(b)/log(a)

Shouldn't be hard to do now.

Ok thanks Kill. And yea...squirt, I pretty much don't listen in my class at all...And I take notes every now and then. I could probably have an A rather than a C in the class...but I just don't try. I hate math.

Squirt · **Joined:** Jan 2008 **Posts:** 8186 **Location:**

I don't take notes or listen in class either. But I got an A+ in my Log test this week.
We just started this too

heroo · **Joined:** Sep 2006 **Posts:** 6618 **Location:**

how old are you squirt?

Squirt · **Joined:** Jan 2008 **Posts:** 8186 **Location:**

heroo wrote:

how old are you squirt?

17 =D!
Annnnnd I'm a Junior! I'm in precalc because, **** math lol, I preffer English or a science.

xKingpinx · **Joined:** Aug 2007 **Posts:** 2153 **Location:**

Squirt wrote:

I don't take notes or listen in class either. But I got an A+ in my Log test this week.
We just started this too

Ok...so your better at math than me? I don't really know how to reply to that... lol

Squirt · **Joined:** Jan 2008 **Posts:** 8186 **Location:**

xKingpinx wrote:

Squirt wrote:

I don't take notes or listen in class either. But I got an A+ in my Log test this week.
We just started this too

Ok...so your better at math than me? I don't really know how to reply to that... lol

Jaja my bad didn't mean it like that.

But theres an awesome guy on youtube called Patrickjmt or something like that and he has so many math videos. They really help, alot

xKingpinx · **Joined:** Aug 2007 **Posts:** 2153 **Location:**

Squirt wrote:

xKingpinx wrote:

Squirt wrote:

I don't take notes or listen in class either. But I got an A+ in my Log test this week.
We just started this too

Ok...so your better at math than me? I don't really know how to reply to that... lol

Jaja my bad didn't mean it like that.

But theres an awesome guy on youtube called Patrickjmt or something like that and he has so many math videos. They really help, alot

Ok thanks man, I'll check him out.

Hapjap · **Posted:** Sun Feb 20, 2011 5:15 pm

Squirt wrote:

heroo wrote:

how old are you squirt?

17 =D!
Annnnnd I'm a Junior! I'm in precalc because, **** math lol, I preffer English or a science.

it will get to a point where science more or less = math. equations explain more of the natural world than words ever could...

heroo · **Joined:** Sep 2006 **Posts:** 6618 **Location:**

Hapjap wrote:

Squirt wrote:

heroo wrote:

how old are you squirt?

17 =D!
Annnnnd I'm a Junior! I'm in precalc because, **** math lol, I preffer English or a science.

it will get to a point where science more or less = math. equations explain more of the natural world than words ever could...

you sir, know what you're talking about. math is the most important class at school. you need it in every aspect of life.

McLovin1t · **Joined:** Apr 2008 **Posts:** 1825 **Location:**

heroo wrote:

Hapjap wrote:

it will get to a point where science more or less = math. equations explain more of the natural world than words ever could...

you sir, know what you're talking about. math is the most important class at school. you need it in every aspect of life.

QFT

-.- · **Posted:** Wed Feb 23, 2011 4:46 pm

heroo wrote:

you sir, know what you're talking about. math is the most important class at school. you need it in every aspect of life.

You mean language is most important right? Math and all other thought is useless if you can't communicate it lol

Hapjap · **Posted:** Wed Feb 23, 2011 5:09 pm

-.- wrote:

heroo wrote:

you sir, know what you're talking about. math is the most important class at school. you need it in every aspect of life.

You mean language is most important right? Math and all other thought is useless if you can't communicate it lol

sure, language is important. but it is natural to us as humans. you don't have to take a class to learn how to speak. yes, you do have to learn written language, but it isn't necessary for communication.

-.- · **Posted:** Wed Feb 23, 2011 5:15 pm

math is natural too... it's higher level math that is learned... same with language...

Hapjap · **Posted:** Wed Feb 23, 2011 7:42 pm

not really. today some isolated amazonian tribes still have no words for numbers. they only have words for relative quantities such as some or alot. even the most simplest level of arithmetic such as counting or realizing the comparison between numbers and an exact quantity must be learned.

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