MATH/ALGEBRA HOMEWORK HELP???? 10 POINTS BEST ANSWER.

Okay so I'm a little stuck on math homework this week and its about: scientific notations and standard notations???? I have a math book for reference but its quite advanced and isn't really lay out clearly so I'm not to sure how do work out the sums.

If you know how to work out:

. how to write number's in scientific notation
. Multiply. Express the result in scientific notation:
. how to write a umber in standard notation
. and how to write a number in scinetific notation

I really need your help. I don't want the answers to the questions but just showing how to work them out so if you HAVE to put the answer there to express working it out then I can live wih that. But overall I just want to understand the work not cheat (;

Questions:

1. Write the following number in scientific notation:

8,900,000,000








2. Write the following number in scientific notation:

0.000631








3. Write the following number in standard notation:

7.2 x 10-4








4. Write the following number in standard notation:

2.75 x 108







5. Write the following number in standard notation:
8.9 x 10^9








6. Multiply. Express the result in scientific notation:

(5 x 106)(6 x 102)







7. Multiply. Express the result in scientific notation:

(3 x 102)(2 x 102)







8. Explain how to write each number in scientific notation:

(a.) 0.00043

(b.) 523.4 x 105


10 ponts for the best answer.

Ok here are the rules. In scientific notation u write a number as a decimal number with one number on left of decimal point