Which expression is equivalent to 7^5/7^2 (7x5)x(7x2)
(7x7x7x7x7)x(7x7)
7x5

7x2

7x7x7x7x7

7x7

Brainliest will be given

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