the function f(x)= 34.1 Ln x + 117.7

Question

models the number of U.S. Internet users, f(x) in millions, x years after 1999. By which year will there be 250 million Internet users in the U.S.?

Answer 1

just solve

34.1 lnx + 117.7 = 250
34.1 lnx = 132.3
lnx = 3.88
x = 48.4
so, we're looking at 2048