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A certain college had 3,000 students enrolled in 2015. The college predicts that after 2015, the number of students enrolled each year will be 2% less than the number of students enrolled the year before. Which of the following functions models the relationship between the number of students enrolled, $f(x)$, and the number of years after 2015, $x$ ?
Difficulty: Medium
A:

$f(x)=0.02(3,000)^{x}$

B:

$f(x)=0.98(3,000)^{x}$

C:

$f(x)=3,000(0.02)^{x}$

D:

$f(x)=3,000(0.98)$

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