HELP! the diagram shows a solid made by joining a solid hemisphere to a solid circular cone. the centre of the plane face of the cone coincides with the centre of the plane face of the hemisphere. the radius of the hemisphere is 3 cm. the radius of the base of the cone is 3 cm. the volume of the solid is 30 pi cm3. work out the total surface area of the solid. give your answer as a multiple of pi.

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.