General admission to the state fair of texas is $16.00. for guests to ride the various rides, they must use coupons that cost $0.50 each. the number of coupons needed for each ride varies. the representative function for the situation is c(x) = 0.5x + 16, where c(x) represents total cost as a function of the number of coupons, x. what is the domain for visiting and riding rides at the state fair of texas?

a. x ≥ 0, where x is an integer
b. x ≥ 0, x is non-negative
c. x is all real numbers
d. x ≥ $16.00