Question: Suppose that X is a random variable with a mean of 5 and a variance of 9. If Y= 2X^2+4, find the mean of Y.

Suppose that X is a random variable with a mean of 5 and a variance of 9. If Y= 2X^2+4, find the mean of Y. [Hint: Rewrite E(X^2) as a function of the mean and variance of X.]

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