Consider quadrilateral CREB made up of squares COAB and OREA, where AE=4. Assume squares COAB and OREA are congruent. Determine the values of m and n and the length of RB in the quadrilateral CREB. I WILL GIVE BRAINLIEST TO FASTEST ANSWER AND MOST UNDERSTANDING

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)