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July 29, 2014

July 29, 2014

Posted by **Kim** on Friday, May 27, 2011 at 2:06pm.

- Math 116 -
**drwls**, Friday, May 27, 2011 at 11:23pmThe record supposedly drops 0.6 seconds every 30 years, or 0.02 seconds per year.

R(t) = 45.7 - 0.02 t

When R = 43.92,

0.02 t = 1.78

t = 89 years after 1920

That makes it 2009.

Those look like world record times for the men's 400 meter hurdles. Actually the record is lower now. Records are really not broken at a constant rate per eat.

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