2 answers:
I don't know if this would help but if your using a book you can find the answer at http://www.slader.com/subject/math/homework-help-and-answers/
Here we are given the equation:

Here x represents the year.
Now plugging the value of x for different year :
A. x=1,

y=9700
option A. 1 year is correct.
B. x=2,

y=9404
But in the option we are given y=9308
So option B is incorrect.
C. x=3,

y=9126.73
y= 9127 ( approx.)
So option C is correct.
D. x=4

y=8852.9
y=8853 (approx)
So option D is also correct
Answer : option C. 3
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