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Battery manufacturers compete on the basis of the amount of time their products last in cameras and toys. A manufacturer of alkaline batteries has observed

Battery manufacturers compete on the basis of the amount of time their products last in cameras and toys. A manufacturer of alkaline batteries has observed that its batteries last for an average of 25 hours when used in a toy racing car. The amount of time is normally distributed with a standard deviation of 3.5 hours. What is the probability that the battery lasts fewer than 24 hours?

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