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The length of time between charges of a cellphone has a normal distribution with a mean of 30 h and a standard deviation of 8

The length of time between charges of a cellphone has a normal distribution with a mean of 30 h and a standard deviation of 8 h. If you were to observe the length of time that passes before a cellphone needs to be charged, what is the likelihood that this time will be between 24 h and 36 h? Make sure to round your answer to the nearest tenth of a percent.

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