If isosceles triangle ABC has a 130° angle at vertex B, which statement must be true?

Which expression is equivalent to? assume x > 0 and y > 0.

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

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