A rocket is launched from the top of an 80 foot cliff with an initial velocity of 100 feet per second. The​ height, h, of the rocket after t seconds is given by the equation h=16t^2+100t+80. How long after the rocket is launched will it be 30 feet from the​ ground?

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