Question regarding the population mean
How large a sample should be taken if the population mean is to be estimated with 90% confidence to within $79? The population has a standard deviation of $908.
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A flat surface with area 2.2 m2 is in a uniform electric field of 910 N/C. What is the electric flux through the surface when it is at right angles to the field, 45 degrees to the field and parallel to the field?
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