On a given day, the proportion of workers from Company B who purchase a coffee from the company cafeteria is 0.62 and the proportion of workers from Company C who purchase a coffee from the company cafeteria is 0.71. A random sample of40 workers was selected from Company B and another random sample of 40 workers was selected from Company C. The proportion of workers from Company B who purchased coffee was pˆB=0.70 and the proportion of workers from Company C who purchased coffee was pˆC=0.75. What is the correct unit of measure for the mean of the sampling distribution of pˆB−pˆC ?

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What are the main functions of the human skeleton? a exchange of gases b support and movement c sensing the environment d digestion and excretion

Idon’t understand 8. plz ! we are finding the area of polygons. thx in advance!