Ineed to write this problem out on paper and show my work. the lesson says to times both decimals by 10 to make them whole numbers but i don't understand, you!

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