Due the two items below contain an equal proportion of fat. Steak: A 20 ounce steak contains 6 ounces of fat. Hamburger: A 6 ounce hamburger contains 0.75 ounces of fat. (Plz help I had a stroke reading this and I'm not good at proportions)

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?