You need to order gravel for your driveway, which is 8 feet wide and 210 feet long. Assume that you would like the gravel to be 6 inches deep. How much gravel is needed, in cubic feet?

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

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.