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Finding the consumption level separating the bottom 45% from the top 55%.

In one region, the September energy consumption levels for single-family homes are found to the normally distributed with a mean of 1050 kWh and a standard deviation of 218kWh. Find P45, which is the consumption level separating the bottom 45% from the top 55%.

A. 1078.3
B. 1021.7
C. 1087.8
D. 1148.1

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