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he total time, measured in units of 100 hours, that a teenager runs her hair dryer over a period of one year is a

he total time, measured in units of 100 hours, that a teenager runs her hair dryer over a period of one year is a continuous random variable X that has the density unction below. Use the theorem below to evaluate the mean of the random variable Y=51X2+22X, where Y is equal to the number of kilowatt hours expended annually. x. 0

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