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#1 2012-08-13 13:56:05
- SlowlyFading
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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! 
Thanks!
I'm just here to get some help with an online math course I'm taking.
#2 2012-08-13 14:17:27
- bobbym
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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.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.
#3 2012-08-13 14:22:51
- careless25
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Re: Exponents and Scientific Notation
EDIT: Removed, to not confuse OP
Last edited by careless25 (2012-08-14 00:04:31)
#4 2012-08-13 17:08:42
- bob bundy
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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 … 02&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
#5 2012-08-14 02:31:16
- SlowlyFading
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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.
#6 2012-08-14 04:01:15
- bobbym
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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.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.