Mr. o'brien is paid $10 per hour for the first 40 hours he works in a week. he is paid 1.5 times that rate for each hour after that. last week, mr. o'brien worked 44 hours. how much will he get paid? how much would he get paid of he worked 50 hours?

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)