Can any one find the other answers and no links plz

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom

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

Cavaliers principle states that two solids with equal heights and cross-sectional volumes at every level have equal areas.