Three streets intersect to form a right triangle as shown below. The parts of streets that make up the legs of this triangle are 42 yd. long and 56 yd. long. How long is the third side of the triangle formed by the three streets

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)