In a certain city, the temperature normally ranges from 20 degrees fahrenheit and 80 degrees fahrenheit. write a compound inequality that describes abnormal temperature ranges for this city and then convert that inequality to degrees celsius. f=9/5c+32

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?