Solve the problem.A rescue cable attached to a helicopter weighs 2 lb/ft. A 170-lb man grabs the end of the rope and is pulled from the ocean into the helicopter. How much work is done in lifting the man if the helicopter is 30 ft above the water?
A. 1070 ft ? lb
B. 6000 ft ? lb
C. 5160 ft ? lb
D. 6900 ft ? lb
Answer: B
Mathematics
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.
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= 
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