The General Manager of the Service Department of MCA Television

Short Answer

The General Manager of the Service Department of MCA Television Company has estimated that the time that elapses between the dates of purchase and the dates on which the 19-in. sets manufactured by the company first require service is normally distributed according to the probability density function
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where x is measured in months. Determine the percentage of sets manufactured and sold by MCA that may require service 90-100 mo after purchase.
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Round the answer to the nearest hundredth, if necessary.
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__________%