Alocal charity is wrapping holiday gifts for local needy families. when 8 volunteers work together, they can get all the gifts wrapped and distributed in 6 hours. how many hours would it have taken if there had been 12 volunteers, each working at the same rate?

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

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