Mo says that 0.23567 is not a rational number. Which of these explains why Mo is incorrect? 0.\overline{1}0. 1 is a(n)

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?