If xi s a nonnegative random variable with mean 25, what can be said about: (a) e[x^3]? (b) e[√x]? (c) e[logx]? (d) e[e^−x]?

Step-by-step explanation:

We are given the following information in the question:

s a nonnegative random variable with mean 25

We have to find the following:

a) Since is a convex function,

b) Since is a convex function,

c) Since is a convex function,

d) Since is a convex function,

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.  

b. 2 and 4

step-by-step explanation: