To find √15, Ben found 3²-9 and 4²= 16. He said that since 15 is between 9 and 16, √15 must be between 3 and 4. He thinks a good estimate for √15 is 3+4= 3.5. Show the approximate in a 2 number line. Is Ben's estimate high, low or correct? Explain.

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