Find the directional derivative of the function at the given point in the direction of the vector v. f(x, y, z) = x2y + y2z, (2, 7, 9), v = 2, −1, 2 duf(2, 7, 9) =

What is the order of magnitude for the number of liters in a large bottle of soda served at a party

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.