Let x ~ n(0, 1) and y = ex. y is called a log-normal random variable.
(a) find the probability density function of y .
(b) find the nth moment e(yn) of y .
hint. do not compute the moment generating function of y . instead relate
the nth moment of y to an expectation of x that you know.

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?

Which option identifies how kevin should proceed in the following scenario? four years ago kevin designed an mp3 player for young children. now that technology has changed, he would like to update his design to ensure that it encompasses cutting-edge techniques. by creating a third-angle projection of his ideas by designing an isometric projection of his new ideas by referring to past designs and illustrations of his original model by conferring with engineers who have improved upon similar devices