The fire department is going to buy some new hoses. It must be powerful enough to propel water 75 feet in the air. The advertisement says that the water flows with a velocity of 72 ft./s. Use the formula V equals the square root of 2GH determine whether the hose advertised is suitable

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)