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**

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

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.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

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.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

Offline

**careless25****Real Member**- Registered: 2008-07-24
- Posts: 559

EDIT: Removed, to not confuse OP

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

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 7,548

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

Children are not defined by school ...........The Fonz

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

Offline

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

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.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

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.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

Offline

Pages: **1**