Polynomials
posted by Sharon .
3. In 2002, Home Depot’s sales amounted to $58,200,000,000. In 2006, its sales were $90,800,000,000
a. Write Home Depot's 2002 sales and 2006 sales in scientific notation.

You might try here for some assistance:
http://search.yahoo.com/search?fr=mcafee&p=how+to+write+sales+in+scientific+notation
Sra 
For $58,200,000,000., move the decimal point to the left until it is to the right of the first nonzero digit (5). Multiply by 10 raised to the power of the number of digits moved (10). So the answer is
5.82*10^{10}
I will leave you to do the second one. Post your answer for checking if you wish.