What percent of 35 = 21

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect

The formula for the area of a regular polygon is a=1/2ap . what is the equation solved for a?

Ablueberry plant produces about 26 blueberries per day. if the farmer picked 472 blueberries, how many days did the plants produce blueberries?