Suppose that X and Y are jointly continuous with joint probability density function fX, Y px, yq " # xe´xp1`yq if x ą 0 and y ą 0, 0 otherwise. (a) Find the marginal density functions of X and Y . (b) Calculate the expectation ErXY s (c) Find the conditional density function of X given Y " y.

Acylinder with a base diameter of x units has a volume of jxcubic units which statements about the cylinder are true? check all that apply. the radius of the cylinder is 2 x units. the radius of the cylinder is 2x units. the area of the cylinder's base is 200 square units. the area of the cylinder's base is a square units. the height of the cylinder is 2x units. the height of the cylinder is 4x units. mark this and return save and exit next submit