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Mathematics 9 Online
OpenStudy (anonymous):

NEED HELP FAST The popping times of the kernels in a certain brand of microwave popcorn are normally distributed, with a mean of 150 seconds and a standard deviation of 11 seconds. The first kernel pops 126 seconds after the microwave oven is started. What is the z-score of this kernel? Round your answer to two decimal places. A. 2.18 B. -0.46 C. -2.18 D. 0.46

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