Posted by **Rachel** on Wednesday, April 30, 2014 at 12:28am.

if the work required to stretch a spring 1 ft beyond its natural length is 12 ft-b, how much work is needed to stretch 9 inches beyond its natural length?

- Calculus -
**illegal**, Friday, March 18, 2016 at 10:33pm
anal

- Calculus -
**your**, Friday, March 18, 2016 at 10:33pm
mother

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