Answer
There were around $463.2$ million cell phone users in
the UNited Stated in 2014.
Work Step by Step
We have to assume that the given equation would still model the number of cell phone users after 2010
2014 is 12 years after 2002 so $x=12$. Substitute 12 to $x$ in the equation to have:
$\\y=136.76(1.107)^x
\\y=136.76(1.107)^{12}
\\y=463.159464
\\y\approx 463.2$
