four students can wash a car in 15 minuets. if the time varies inversely with the number of students washing the car, how many minutes will it take three students to coplete that same job

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)