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#1 2013-08-11 21:30:23

EbenezerSon
Member
Registered: 2013-07-04
Posts: 465

Standard Form.

Simplify the following, leaving your answer in standard form.

I have solved it but had different solution  from what the book has, I need some assistance.


1) 0.81 * 10^-5/2.25 * 10

2). 0.0048 * 0.81 * 10^-7/ 0.027 * 0.04 * 10^6


Both number one and two are in a  'square root sign'


Please, I would be much obliged if you produce your steps here.


Thanks in advance.


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#2 2013-08-11 21:35:48

bobbym
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From: Bumpkinland
Registered: 2009-04-12
Posts: 86,771

Re: Standard Form.

What were your answers?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#3 2013-08-11 21:58:29

EbenezerSon
Member
Registered: 2013-07-04
Posts: 465

Re: Standard Form.

1). I had 6.0 * 10^-15

And

2). I had, 6.0 * 10^-9.

Last edited by EbenezerSon (2013-08-11 22:09:07)


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#4 2013-08-11 22:13:50

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,771

Re: Standard Form.

Okay, 1) looks like this?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#5 2013-08-11 22:19:21

EbenezerSon
Member
Registered: 2013-07-04
Posts: 465

Re: Standard Form.

Yes. But all are in a square root.

Sorry! the denominator is 2.25 * 10^7

Forgive me.


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#6 2013-08-11 22:23:50

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,771

Re: Standard Form.

So we have:


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#7 2013-08-11 22:30:22

EbenezerSon
Member
Registered: 2013-07-04
Posts: 465

Re: Standard Form.

Right!


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#8 2013-08-11 22:34:58

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,771

Re: Standard Form.

You were close I am getting 6 x 10^-7


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#9 2013-08-11 22:41:58

EbenezerSon
Member
Registered: 2013-07-04
Posts: 465

Re: Standard Form.

Please can you provide the steps?

Thanks.


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#10 2013-08-11 22:45:39

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,771

Re: Standard Form.

Do it by pieces, what is


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#11 2013-08-11 22:52:51

EbenezerSon
Member
Registered: 2013-07-04
Posts: 465

Re: Standard Form.

= 10^(-5-7)=10^-12.


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#12 2013-08-11 22:55:35

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,771

Re: Standard Form.

Very good.

Now what is .81 / 2.25?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#13 2013-08-11 23:03:38

EbenezerSon
Member
Registered: 2013-07-04
Posts: 465

Re: Standard Form.

= 0.36 *10^0


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#14 2013-08-11 23:08:40

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,771

Re: Standard Form.

Leave out the 10^0, it is 1. We do not show multiplication by 1.

Now combine the two answers.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#15 2013-08-11 23:18:05

EbenezerSon
Member
Registered: 2013-07-04
Posts: 465

Re: Standard Form.

0.36 *  10-12
= 0.6 * 10^-6
= 6.0 * 10^-7

It looks I was confused by the root.


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#16 2013-08-11 23:23:28

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,771

Re: Standard Form.

Very good. It is awful making a human being do such calculations. We have machinery for that nowadays.


Is this 2)?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#17 2013-08-11 23:43:30

EbenezerSon
Member
Registered: 2013-07-04
Posts: 465

Re: Standard Form.

Yes, Bobbym.

I just want to become used to them, cos in no time I will be teaching others.


Now, I had the same answer for the second question.


I owe you some thanks. :-)


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#18 2013-08-11 23:52:10

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,771

Re: Standard Form.

That book has a sense of humor at least. I am getting the same answer as 1).

I owe you some thanks. :-)

No thanks required.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#19 2013-08-12 00:14:32

EbenezerSon
Member
Registered: 2013-07-04
Posts: 465

Re: Standard Form.

Yes I tried to solve it once again and now I have the same answer as the first one, The root was my main problem, but now I have known how to go about that.



Thank you very much Bobbym.

God bless you!


I know only one thing - that is that I know nothing

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#20 2013-08-12 00:16:50

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,771

Re: Standard Form.

Hi;

You are welcome. I am going to take a break, see you in a bit.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#21 2013-08-12 00:25:15

EbenezerSon
Member
Registered: 2013-07-04
Posts: 465

Re: Standard Form.

Okay.

I will return getting to nıght time.


I know only one thing - that is that I know nothing

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#22 2013-08-12 02:53:43

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,771

Re: Standard Form.

Hi;

Sorry for the delay but I needed an hour or so nap.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

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