AnswersPrecalculusDot Product and Work

Dot Product and Work Answers

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1
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Two vectors of lengths 5 and 8 have a dot product equal to –20. Which is true about the vectors?

A
The angle between the vectors is acute.
B
The angle between the vectors is obtuse.
C
They point in the same direction.
D
They point in opposite directions.
2
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x · y =

A
320
B
240
C
3888/5
D
5184/5

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