What's 2 divided by 9/10? I would really like to know. :)

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.

In the diagram of circle o, what is the measure of zabc?