In 1985, there were 285 cell phone subscribers in the small town of Centerville. The number of subscribers increased by 75% per year after 1985. How many cell phone subscribers were in Centerville in 1994?
We have the following exponential function
N = 285 (1.75)x where N is the number of subscribers after x years
Since 1994 is 9 years after 1985, we have
N = 285 (1.75)9 ≈ 43,872 subscribers
( That's a pretty big increase !!! }