The recursive formula a2=18.5, an-1+1.5 models the number of people, in millions, that own a smartphone in the us, n years after 2014. write an equivalent explicit formula for the situation.

Consider this expression and the steps to evaluate it. 4^5(−2)^9/4^8(−2)^3 1. apply the quotient of powers:      (−2)^a/4^b 2. evaluate powers:           c/d select the value of each variable. a = _ b = _ c = _ d = _