I WILL BE MARKING BRAINLIEST TO THE ANSWER WITH AN EXPLANATION ON THE ANSWER (picture attached) ^

Which statement justifies why angle ebc measures 90?

Let x = a + bi and y = c + di and z = f + gi. which statements are true?

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)