The following polygons are given. All of the polygons are regular polygons. Polygon a. Convex 15-gon Polygon b. Convex 16-gon Polygon c. Convex 17-gon Polygon d. Convex 18-gon Polygon e. Convex 19-gon Polygon f. Convex 43-gon Polygon g. Convex 44-gon Polygon h. Convex 45-gon Polygon i. Convex 46-gon Polygon j. Convex 47-gon Which polygon(s) has (have) interior angles that are whole numbers (a number that is not a fraction or a decimal)

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