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How do I find out if a charity in the United States is for real? What requirements must be met by a mathematical system in order to be a field? Provide one example.? A die is rolled 11 times. Find the probability of rolling exactly 1 six.? Given that f(x) dx=51/11 bound from (2/7) what is ∫ f(v) dv bound from (7,2)? How to find the sample size. all steps including finding the z-score.?