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#1 2013-08-12 19:30:23

EbenezerSon
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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.


wave

#2 2013-08-12 19:35:48

bobbym
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Re: Standard Form.

What were your answers?


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#3 2013-08-12 19:58:29

EbenezerSon
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Re: Standard Form.

1). I had 6.0 * 10^-15

And

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

Last edited by EbenezerSon (2013-08-12 20:09:07)

#4 2013-08-12 20:13:50

bobbym
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Re: Standard Form.

Okay, 1) looks like this?


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#5 2013-08-12 20:19:21

EbenezerSon
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Re: Standard Form.

Yes. But all are in a square root.

Sorry! the denominator is 2.25 * 10^7

Forgive me.

#6 2013-08-12 20:23:50

bobbym
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Re: Standard Form.

So we have:


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#7 2013-08-12 20:30:22

EbenezerSon
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Re: Standard Form.

Right!

#8 2013-08-12 20:34:58

bobbym
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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.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#9 2013-08-12 20:41:58

EbenezerSon
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Re: Standard Form.

Please can you provide the steps?

Thanks.

#10 2013-08-12 20:45:39

bobbym
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Re: Standard Form.

Do it by pieces, what is


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#11 2013-08-12 20:52:51

EbenezerSon
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Re: Standard Form.

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

#12 2013-08-12 20:55:35

bobbym
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Re: Standard Form.

Very good.

Now what is .81 / 2.25?


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#13 2013-08-12 21:03:38

EbenezerSon
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Re: Standard Form.

= 0.36 *10^0

#14 2013-08-12 21:08:40

bobbym
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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.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#15 2013-08-12 21:18:05

EbenezerSon
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Re: Standard Form.

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

It looks I was confused by the root.

#16 2013-08-12 21:23:28

bobbym
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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.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#17 2013-08-12 21:43:30

EbenezerSon
Full Member

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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. :-)

#18 2013-08-12 21:52:10

bobbym
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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.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#19 2013-08-12 22:14:32

EbenezerSon
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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!

#20 2013-08-12 22:16:50

bobbym
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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.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#21 2013-08-12 22:25:15

EbenezerSon
Full Member

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Re: Standard Form.

Okay.

I will return getting to nıght time.

#22 2013-08-13 00:53:43

bobbym
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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.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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