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Problem

u, with, vector, on top, equals, left parenthesis, 2, comma, minus, 4, right parenthesis
Find the magnitude of u, with, vector, on top.
Enter an exact answer as an expression with a square root symbol or enter an approximate answer as a decimal rounded to the nearest hundredth.
vertical bar, vertical bar, u, with, vector, on top, vertical bar, vertical bar, equals
Do 4 problems