General admission to the state fair of texas is $16.00. for guests to ride the various rides, they must use 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. all integers greater than or equal to 0 b. all real numbers greater than or equal to 0 c. all real numbers d. all integers greater than or equal to 16