Find the work performed when the given force F is applied to an object, whose resulting motion is represented by the displacement vector d. Assume the force is in pounds and the displacement is measured in feet.
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?
A. 646 ft-lb
B. 645 ft-lb
C. 643 ft-lb
D. 648 ft-lb
E. 650 ft-lb
Answer: A
Mathematics
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?
?
A. 
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