Which Statement Is True About the Unit Vectors

question 39

Multiple Choice

Which statement is true about the unit vectors
,
And
?

• A)Their directions are defined by a left-handed coordinate system.
• B)The angle between any two is 90 degrees.
• C)Each has a length of 1 m.
• D)If is directed east and is directed south, points up out of the surface.
• E)All of the above.

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Probability

The measure of how likely it is for an event to occur, expressed as a number between 0 (impossible) and 1 (certain).

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Expected Value

The average outcome of a random variable, calculated as the sum of all possible values each multiplied by their respective probability of occurrence.

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