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#1 2012-08-12 15:56:05

SlowlyFading
Member
Registered: 2012-06-12
Posts: 149

Exponents and Scientific Notation

Well, in the other lesson I'm working, I got 4 out of 20 wrong.

I don't understand them and am unable to work it out.

The problems;
simplify the following exponential expressions:
2. (x-3)5

9. Divide the following numbers using scientific notation: (4 x 102)/(1 x 103)

19. Estimate the amount of juice in a typical orange juice carton in liters.
(That's a strange question, huh?)

20. Estimate the weight of a small can of soup in grams.
(Again, strange question if you ask me.)

Anyway, I need the correct answer and the steps you used so I can (hopefully) understand it myself! big_smile

Thanks!


I'm just here to get some help with an online math course I'm taking.

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#2 2012-08-12 16:17:27

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Exponents and Scientific Notation

Hi;

Please use the exponentiation operator,"^".

Is that 10^3? I think it might be but you have to be clear when doing math.

Is that (x-3)^5 ?


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.

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#3 2012-08-12 16:22:51

careless25
Real Member
Registered: 2008-07-24
Posts: 555

Re: Exponents and Scientific Notation

EDIT: Removed, to not confuse OP

Last edited by careless25 (2012-08-13 02:04:31)

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#4 2012-08-12 19:08:42

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,528

Re: Exponents and Scientific Notation

hi SlowlyFading,

9. Divide the following numbers using scientific notation: (4 x 102)/(1 x 103)

You can split this into two divisions:

Click on the Latex so you can begin to learn how to display exponents properly.



19. Estimate the amount of juice in a typical orange juice carton in liters.
(That's a strange question, huh?)

Yes, a bit strange.  I think this is just to get you to have an idea about how big a liter and a gram are.

You're not expected to get an exact answer, just get a result that is about the right size.

So have a look in the cupboard or search on-line for fruit juice and see what sizes are sold.

My morning fruit juice comes in a one liter pack.

20. Estimate the weight of a small can of soup in grams.

Again you could look in your cupboard or on-line.

I've helped someone with this problem before.  But they had a choice of answers, two of which were close and we picked the 'wrong' one.  I felt this was a very unfair question because of the possible answers on offer.  Multi choice is OK for a question like this if five out of six answers are obviously wrong.

I wonder if you are doing the same course?


http://www.mathisfunforum.com/viewtopic … =15902&p=1

NOTE TO EVERYONE:

The first question is on that sheet is



Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#5 2012-08-13 04:31:16

SlowlyFading
Member
Registered: 2012-06-12
Posts: 149

Re: Exponents and Scientific Notation

Thanks Bob Bundy!
As for #2, I figured that out myself. It was super simple and I had already gotten the correct answer it was just written wrong.
Oh and bobbym, you were correct. I'll make sure I do that in the future.

It looks like zee f and I are taking the same course! I had all those same questions!


I'm just here to get some help with an online math course I'm taking.

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#6 2012-08-13 06:01:15

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Exponents and Scientific Notation

Hi;

It looks like zee f and I are taking the same course! I had all those same questions!

She is a very good student. I hope to see her soon.


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.

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