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, $x$ ?

The function $f(x)=200,000(1.21)^{x}$ gives a company's predicted annual revenue, in dollars, $x$ years after the company started selling light bulbs online, where $0<$x$\leq 10$. What is the best interpretation of the statement "$f(5)$ is approximately equal to 518,748" in this context?

The given equations define the functions $f$ and $g$, where $x\geq 0$. Which of the following equations displays, as a constant or coefficient, the maximum value of the function it defines, where $x\geq 0$?

I. $f(x)=33(0.4)^{x+3}$

II. $g(x)=33(0.16)(0.4)^{x-2}$