Which expression is equivalent to 18 1/5 - (-22 2/5) - ( -40 1/5) ? a. 18 1/5 - 22 2/5 - 40 1/5 b. 18 1/5 + (-22 2/5) + (-40 1/5) c. -18 1/5 -22 2/5 + 40 1/5 d. 18 1/5 + 22 2/5 + 40 1/5

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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