Me and my partner got 2 different answers we’re trying to see which one of us is correct

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

What are the sotions to the quadratic equation 9x^2=4

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.