May someone please answer this question. I am a nice handsome growing boy who needs help. Find the area of the polygon please show work. This is due in 20 minutes

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!

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