4) Out of the 440 people surveyed, a 121 said they listen to Spotify at least one a month. With the level of confidence set at 88%, what is the margin of error?

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?