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i nee your , can you ?

Let the mean of the population be 38 instances of from 6" - 9" hatchings per nest, and let the standard deviation of the mean be 3. what sample mean would have a confidence level of 95% or a 2.5% margin of error?

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

In the diagram of circle o, what is the measure of zabc?