Functions:

Between 1993 and 2004, the number of first-year students enrolling in medical school can be modeled by f(x)=10.5x^2-125x+17186 where x=0 represents 1993. Based on the model answer the following:

a What year did the number of first-year enrollments reach a minimum?

b What is the domain of this function?

I am a little confused on what to do because it says x=0 represents 1993. I have no idea how to find what it is asking.

Any help is appreciated...