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.

How do you find the area of a triangle

Solve the equation for b: a= (1/2)(b)(h)

Jack is considering a list of features and fees for current bank: jack plans on using network atms about 4 times per month. what would be jack’s total estimated annual fees for a checking account with direct paycheck deposit, one overdraft per year, and no 2nd copies of statements? a. $44 b. $104 c. $144 d. $176