Question

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 it's batteries last for an average of 26 hours when used in a toy racing car. The amount of time is normally distributed with a standard deviation of 2.5 hours. What is the probability that the printer produces more than 12,000 pages before this cartridge must be replaced? What is the probability that the printer produces fewer than 10,000 pages?

incomplete
check your average and standard deviation.

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