Find the area of the shaded regions. Give your answer as a completely simplified exact value in terms of π (no approximations).

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Which equation represents the function on the graph?

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?