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Which expression gives you the distance between the points (5,1)and(9,-6)

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1387 grams and standard deviation 161 grams. what is the probability that a randomly selected broiler weighs more than 1,425 grams?