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

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**EbenezerSon****Member**- Registered: 2013-07-04
- Posts: 388

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.

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

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,192

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.**

**Online**

**EbenezerSon****Member**- Registered: 2013-07-04
- Posts: 388

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

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,192

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.**

**Online**

**EbenezerSon****Member**- Registered: 2013-07-04
- Posts: 388

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

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,192

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.**

**Online**

**EbenezerSon****Member**- Registered: 2013-07-04
- Posts: 388

Right!

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

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,192

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

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.

**Online**

**EbenezerSon****Member**- Registered: 2013-07-04
- Posts: 388

Please can you provide the steps?

Thanks.

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

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,192

Do it by pieces, what is

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.

**Online**

**EbenezerSon****Member**- Registered: 2013-07-04
- Posts: 388

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

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

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,192

Very good.

Now what is .81 / 2.25?

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.

**Online**

**EbenezerSon****Member**- Registered: 2013-07-04
- Posts: 388

= 0.36 *10^0

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

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,192

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

Now combine the two answers.

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.

**Online**

**EbenezerSon****Member**- Registered: 2013-07-04
- Posts: 388

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

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,192

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

Is this 2)?

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.

**Online**

**EbenezerSon****Member**- Registered: 2013-07-04
- Posts: 388

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

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,192

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.

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.

**Online**

**EbenezerSon****Member**- Registered: 2013-07-04
- Posts: 388

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

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,192

Hi;

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

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.

**Online**

**EbenezerSon****Member**- Registered: 2013-07-04
- Posts: 388

Okay.

I will return getting to nıght time.

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

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,192

Hi;

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

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.

**Online**

Pages: **1**