A solid metal model of a rocket is made up of a cone attached to a cylinder with the same base radius. The cone has a height of 49 cm. The cylinder has a base radius of 18 cm and a height of 192 cm. Given that the mass of the model rocket is 2145 kg, find the density, in kg/m^3, of the metal which the model rocket is made of, giving your answer correct to the nearest whole number. (Density= Mass/Volume) ​

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)