Please please help me this problem it us due in 20 minutes

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Anormally distributed data set has a mean of 176.3 and a standard deviation of 4.2. what is the approximate z-score for the data value of 167.9? 2.00 −2.00 8.4 −8.4

What is the ratio fraction form of 25: 9

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?