The scale of a square map indicates that each inch on the map corresponds to 5 miles. write an expression that describes the area of land shown on the map. if the map is 8 inches on one side, what is the area of land shown on the map.

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)