At murky middle school, 372 students ride the bus to school. if this number is 60% of school enrollment, then how many students are enrolled at the achool answer and soulution

At the beginning of a call to the cable company, a message tells customers, "after you finish talking to our customer service representative, you will be asked to take a five-question survey about the level of service you recieved. it would be appreciated if you could stay on the line to answer the survey questions." what type of sampling is the cable company using?