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Please help. I'm not using the z table correctly. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.7

Please help. I'm not using the z table correctly.

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.7 years, and standard deviation of 2 years. If you randomly purchase one item, what is the probability it will last longer than 5 years?

Answer = (Round to four decimal places.)

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