Answer:
There were 2,233,800 incarcerated adults in 2007
Explanation:
Number of incarcerated adults:
The number of incarcerated adults in x years after 2000, in thousands, is given by:

How many in 2007?
2007 - 2000 = 7, so this is N(7).

2233.8*1000 = 2,233,800
There were 2,233,800 incarcerated adults in 2007