A clock has a diameter of 16 inches Which measurement is closest to the area of the clock in square inches

A: 804.25 in 2nd power

B : 50.37 in 2nd power

C: 25.13in 2nd power

D: 200.96in 2nd power
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You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

Can you me find the slope! (30 points)

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