One minute after takeoff, an airplane’s altitude was 4,000 feet. three minutes later, it was 20,000 feet. what was the plane’s average altitude change, in feet per minute, during those three minutes?

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected