This may be the most dumbest question I have ever given BUT what it 0.08 as a whole number also if you wanna be friends type it down below and once I can chat maybe by next week I can maybe we can exchange numbers , just DO NOT be over 13 please or atleast don’t be over 14

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?