Arturo O. answered • 03/22/17

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It seems that part of the question was cut off. Please edit and repost. Anyway, it looks like you want the total number of cell phone users N years after 1992, assuming a growth rate of 26% per year.

If you start with 17 x 10

^{6}in 1992, then N years after 1992 you will haveTotal = (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.