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Abby L.

asked • 03/23/17

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

1.Write an exponential function to model situation 
2.Determine how many million Americans used cell phones in 1997

1 Expert Answer


Arturo O. answered • 03/23/17

5.0 (66)

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Arturo O.

If you start with 17 x 106 in 1992, then N years after 1992 you will have

Total = (17 x 106) (1.26)N
Since 1997 is 5 years after 1992,
Total = (17 x 106) (1.26)5 ≅ 54.0 million


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