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 ftb, how much work is needed to stretch 9 inches beyond its natural length?

Calculus  illegal, Friday, March 18, 2016 at 10:33pm
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Calculus  your, Friday, March 18, 2016 at 10:33pm
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