Mario is going to build a box without a lid, whose volume must be 312 cubic centimeters; you will use a rectangular sheet in which you will cut squares of 2 cm per side at the corners. If he knows that the total surface of the sheet after removing the squares is 256 square centimeters, what are the dimensions of the sheet?

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