Hooke's law states that the magnitude of force, F, required to stretch a spring x units beyond its natural length is directly proportional to x. If a force of 3 pounds stretches a spring from its natural length of 10 inches to a length of 10.7 inches, what force will stretch the spring to a length of 11.5 inches? Round your answer to the nearest hundredth.
A. 
B. 
C. 
D. 
E. 
?
Answer: B
Mathematics
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.
A. ln 
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- 6x
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