Mike discovered that the pool in his backyard is leaking slowly. The pool holds 15,434 gallons of water, and is leaking at a rate of 20 gallons per day. If Mike does not replace the water that has leaked from the pool, how many gallons of water will remain in the pool after 122 days?

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)