How do I find simple interest rates?

Find the roots of the equation below. x^2 - 6 + 9 = 0

What are the digits that repeat in the smallest sequence of repeating digits in the decimal equivalent of 24/11?

An internet company charges $8.95 per month for the first 3 months that it hosts your web site. then the company charges $11.95 per month for web hosting. how much money, in dollars, will the company charge for 8 months of web hosting?