Albert and his good buddy Brad are both mechanics at a shop that does oil changes. They are

in a friendly competition to see who can complete the most oil changes in one day. Albert has

already finished 6 oil changes today, and can complete more at a rate of 1 oil change per

hour. Brad just came on shift, and can finish 3 oil changes every hour. Sometime during the

day, the friends will be tied, with the same number of oil changes completed. How long will

that take?

Which of the following would be a reasonable estimate for the weight of a pencil? a. 1 × 10^-20 lb b. 1 × 10^20 lb c. 1 × 10^2 lb d. 1 × 10^-2 lb

Ineed here’s a picture of the question

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