The radio of earth and pluto are 6,371 kilometers and 1161 kilometers respectively approximately how many spheres the size of pluto does it take to have the same volume as earth

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How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

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)