In a survey of a town, 56% of residents own a car, 21% of residents now a truck, and 4% of residents own both a car and a truck. what is the conditional probability that a person also owns a truck, given that they own car? round to the nearest whole percent.

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?