A map of a city uses the scale 1 cm - 50 m. On the map, Second Avenue is 22 cm long. If there is a traffic cone at the start of Second Avenue and a cono every 5 m along the road, how many traffic cones are there in all? There are traffic cones in all

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