Glen wants to improve his grade in history class after failing an exam. he decides to study an extra 2 hours before his next exam, and his grade improves by 9%. what is the unit rate for this situation?

d) 9
d) 2
d) 1
d) 4.5

My favorite songstress gives away 25% of this side of her signature fragrance collection to her charity last month her sales were 1200 how much of her sales did she donate

I’m which figure is point g an orthocenter

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