Use compatible numbers to estimate the quotient. 784/8

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)

What are the solutions of the equation x4 – 5x2 – 14 = 0? use factoring to solve. someone !

Build is 120 wide 20 feet high 48 feet long how many cubic feet and the volume