step by step solution

U.S. Smartphone Users Smartphone users, as a percentage of the population, are projected to be A(t) = 18.952 + 14.088 Inf+1) (Ost 5) percent in year t, where is measured in years, with t = 0 corresponding to 2010. What is the projected average percentage of the population that will be smartphone users over the period from 2010 through 2015?7 (Round your answer to three decimal places.)