Find the Missing Number $\left( 5 \vec { i } + \vec { j } ^ { - } + 4 \bar { k } \right) \cdot ( \vec { i } - \vec { j } + \bar { k } ) = 15$

question 30

Short Answer

Find the missing number. $\left( 5 \vec { i } + \vec { j } ^ { - } + 4 \bar { k } \right) \cdot ( \vec { i } - \vec { j } + \bar { k } ) = 15$

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Definitions:

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Suicide

The act of intentionally causing one's own death.

Suicide Rate

The number of suicides occurring within a given population per unit of time, typically per year.

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