Cellular telephone use has increased over the past two
Chapter , Problem 11.7.23(choose chapter or problem)
Cellular telephone use has increased over the past two decades. Table 11.33 gives the number of cellular telephone subscriptions in the US, in millions, from 2005 to 2010.21 (a) Fit an exponential function to this data with time in years since 2005. (b) Based on your model, by what percent was the number of cell subscribers increasing each year? (c) Based on common sense, what do you expect of the rate of growth in the long run? What does this mean in terms of the shape of the graph? Table 11.33 Year 2005 2006 2007 2008 2009 2010 Subscriptions 207 233 255 263 277 301
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