Please help I’ll mark you as if the answers correct with no link just tell me please

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

Given lm, find the measure of (award brainliest)

Say it if the radius of a circle is 6 inches how long is the subtended by an angle measuring 70 degree