#### Answer

7

#### Work Step by Step

The dot product of a= 3i + 2j - k and b= 4i + 5k is:
<3,2,-1> dotted with <4,0,5> = (3×4) + (2×0) + (-1×5)= 7

Published by
Cengage

ISBN 10:
1285740629

ISBN 13:
978-1-28574-062-1

7

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