a school cafeteria conducted a survey to determine the students favorite hot lunch. 5 different random samples of 100 students each completed the survey. there are 2,000 students in the school based on the survey results which of the following is the closest to the closest to the expected total number of students whose favorite hot lunch is grilled cheese?​

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

The angles in a triangle are represented by 5x, 8x, and 2x+9. what is the value of ? a.10.8 b.11.4 c.9.7 d.7.2

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