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February 28, 2015

February 28, 2015

Posted by **chelsea** on Friday, February 3, 2012 at 6:16pm.

- Math -
**Reiny**, Friday, February 3, 2012 at 9:14pmJack's rate = 1/4

Sue's rte = 1/7

combined rate = 1/4 + 1/7 = 11/28

combined time = 1/(11/28) = 28/11 = 2.5454..

or 2 hrs, 33 minutes (appr for minutes)

- Math -
**chelsea**, Friday, February 3, 2012 at 10:28pmThanks for showing me.

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