A 28-foot ladder is leaning against a building in such a way that it also touches the top of an
8-foot fence. The bottom of the ladder is 6 feet
from the base of the fence. The fence is 8 feet
from the building. How high is the top of the
ladder on the building?

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