If the following amounts of lumber need to be delivered to each of 2 different staging areas at 4 different job sites, how many total boards of each size will you need?
A. (65) 2 x 45
O (520) 2 x 45
O (500) 2 x 4s
O (540) 2 x 4s
O (580) 2 x 45

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)

Travis and paula went to lunch.travis ordered a sandwich for $7.50 and paula ordered a burger for $5.25.after lunch,they left a 15% tip for the waiter.how many money did they spend altogether?

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