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The duration of electromagnetic pulses (EMP) from solar flares is known to be normally distributed with...

The duration of electromagnetic pulses (EMP) from solar flares is known to be normally distributed with a mean of 8.1 minutes and a standard deviation of 1.2 minutes.

a) What is the probability an EMP lasts less than 6.50 minutes? %

b) What is the probability an EMP lasts more than 8.90 minutes? %

c) What is the probability of an EMP lasts between 6.50 minutes and 17.00 minutes? %

Write your answers in percent form. Round your answers to the nearest tenth of a percent.

Math   Statistics-And-Probability   
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