Growth and Decay, math homework help

1. Radio stations numbered 220 in 1996.  The number of radio stations has since increased by approximately 14.3% each year.

A.  Write and equation for the number of sports radio stations for 8 years after 1996.

B.  If the trend continues predict the number of radio stations in 2015.

2.  Determine the amount of investment if $500 is invested at an interest rate of 4.23% compounded quarterly for 12 years.

3.  Determine the amount of investment if $300 is invested at an interest rate of 7.5% compounded semiannually for 20 years.

4.  Person a bought a condo for $100,000 in 2010.  If the value appreciates at an average rate of 6% per year, what would the value be in 2015?

5.During the 1990s, the forest area of G decreased at an average rate of 1.7%

A.  in 1990 was 31,400 square kilometers, write an equation for the forest area for 6 years after 1990.