Suppose that a 90% confidence interval for a population mean μ is constructed from a sample, resulting in the interval from 110 to 150. what was the value of the sample mean that was collected? what was the size of the margin of error?

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

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