In 1992, about 17 million americans used cell phones. Over the next few years, usage increased about 26% each year.

Question

1.Write an exponential function to model situation 

2.Determine how many million Americans used cell phones in 1997

Answer 1

See solution posted at https://www.wyzant.com/resources/answers/294349/in_1992_about_17_million_americans_used_cell_phones_over_the_next_few_years_usage_increased_about_26_each_year_write_exponential_function

If you start with 17 x 10^6 in 1992, then N years after 1992 you will have Total = (17 x 10^6) (1.26)^N. After 5 years, total = (17 million)(1.26)^5 = 54.0 million (rounded off). That is the total for 1997.