Two cyclists, 108 miles apart, start riding toward each other at the same time. One cycles 2 times as fast as the other. If they meet 4 hours later,
what is the speed in mih) of the faster cyclist?
a. Write an equation using the information as it is given above that can be solved to answer this problem. Use the variable r to represent the speed
of the slower cyclist.
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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)