Express the radical using the imaginary unit, iii.
Express your answer in simplified form.
\pm\sqrt{-72}=\pm±
−72

=±plus minus, square root of, minus, 72, end square root, equals, plus minus

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