According to a 2008 study published by the afl-cio, 78% of union workers had jobs with employer health coverage compared to 51% of nonunion workers. in 2009, the employee benefit research institute cited data from large samples that suggested that 80% of union workers had health coverage compared to 56% of nonunion workers. let’s suppose the 2009 data came from random samples of 3,000 union workers and 5,000 nonunion workers. compute the mean of the sampling distribution of differences in the proportions insured.

S-7< 3 i need answering this problem someone asap answer

Find the volume of the described solid. the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x. a) 441b) 147c) 864d) 882

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.