6. Suppose that a point (X, Y ) is chosen at random from the region S in the xy-plane containing all points (x, y) suchthatx≥0,y≥0,and4y+x≤4. a. Determinethejointp. d.f. ofXandY. b. Suppose that S0 is a subset of the region S having area α and determine Pr[(X, Y ) ∈ S0].

What are the values of each variable in the diagram below?

Which expression gives the exact value of x?

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters