Given a joint probability density function: f subscript X comma Y end subscript (x comma y )space equals space fraction numerator (y squared minus x squared )over denominator 8 end fraction e to the power of negative y end exponent comma space space space space space space space space 0 less than y less than infinity comma space space space minus y less or equal than x less or equal than y What is E[X | Y

5y

step-by-step explanation:

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.

answer: $1794

step-by-step explanation: