Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

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

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

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


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

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,678

Re: Standard Form.

What were your answers?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

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)


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

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,678

Re: Standard Form.

Okay, 1) looks like this?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Standard Form.

Yes. But all are in a square root.

Sorry! the denominator is 2.25 * 10^7

Forgive me.


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

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,678

Re: Standard Form.

So we have:


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Standard Form.

Right!


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

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,678

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 agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Standard Form.

Please can you provide the steps?

Thanks.


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

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,678

Re: Standard Form.

Do it by pieces, what is


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Standard Form.

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


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

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,678

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 agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Standard Form.

= 0.36 *10^0


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

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,678

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 agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Standard Form.

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

It looks I was confused by the root.


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

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,678

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 agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

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. :-)


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

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,678

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 agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

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

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,678

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 agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Standard Form.

Okay.

I will return getting to nıght time.


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

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,678

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 agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

Board footer

Powered by FluxBB