Atractor-trailer travels 205.296 miles in 3.12 hours. what is the speed at which the tractor-trailer is traveling?

a.62.05 miles per hour
b.63.2 miles per hour
c.64.05 miles per hour
d.65.8 miles per hour
e.66.5 miles per hour

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)

Sawsan recorded the favorite sport of students at her school. she surveyed 200 students. how many students chose tennis?

Simplify the rational expression. state any restrictions on the variable. t^2-4t-12 / t-8 the / is a fraction sign.