Question

In the year 2000 there were 350 mobile phones users living in the small town of Phoneville. Since 2000 the number of residents using mobile phones has increased by 25% each year, that is, each year the number of mobile phones increases by a factor of 1.25
Calculate, to three significant figures, the number of mobile phone users after 19 years. You may find it useful to first devise a formula for the number of mobile phone users after n years.

Answer 1

number of mobile phones
= 350(1.25)^19 = 24 286.13

I thought Phoneville was a small town?

Answer 2

Thanks! I've no idea, i thought my answr was too far off but I was using the wrong formula. Thanks!