Rational Functions and End Behavior Practice Test

In an economic model, the average cost per item (in dollars) is approximated by $C(x)=\dfrac{2000+50x}{x}$ for $x>0$, where $x$ is the number of items produced. What does $\lim_{x\to\infty} C(x)$ represent, and what is its value?

In an economics model, the average cost (in dollars) per item is $A(x)=\dfrac{2000+50x}{x+10}$, where $x$ is the number of items produced and $x\ge0$ with $x\neq -10$. In the context of this model, how does $A(x)$ behave as production becomes very large? Use $\lim_{x\to\infty} A(x)$ and identify the horizontal asymptote.​