In problem involving days, a 365-day year is assumed. Telecommunications. According to...

In problem involving days, a 365-day year is assumed.

Telecommunications. According to the Telecommunications industry Association, wireless telephone subscriptions grew from about 4 million in 1990 to over 180 million in 2005 (Table 3). Let x represent years since 1990.

(A) Find an exponential regression model for this data. Estimate (to the nearest million) the number of subscribers in 2015.

(B) Some analysts estimate the number of wireless subscribers in 2018 to be 300 million. How does this compare with the prediction of the model of part (A)? Explain why the model will not give reliable predictions far into the future.