Khan/khan-exercises — Issue #13334: Units - how did you arrive at 668.800
Author: KhanBugz
Created: 2012-02-08 02:06:29+00:00
State: open
Labels: firefox, hard, leopard

Reporter: isaiahpone@gmail.com

We have worked and worked this problem and still this does not appear correct or something is missing. Please assist.
38 miles/hour*5280inchs/1mile*12inches/1foot*1hr/60mins*1min/60 seconds =668.800 inches/seconds. This is rounded off to the nearest thousandth. I get lost after 2,407,680inches/1foot. I'm not sure if I multiply or divide. Either way I don't get the 668.800 inches/seconds sum
Please help me Isaiah

[units.html?seed=30&problem=english](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/units.html?seed=30&problem=english&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/units.html?seed=30&problem=english&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%2240%2C128.000%5C%22%22%2C780%5D%2C%5B%22incorrect-activity%22%2C%22%5C%2240%2C128%5C%22%22%2C4%5D%2C%5B%22incorrect-activity%22%2C%22%5C%2240%2C128%5C%22%22%2C6%5D%2C%5B%22hint-activity%22%2C%220%22%2C7%5D%2C%5B%22hint-activity%22%2C%220%22%2C210%5D%5D)

["40,128.000","40,128","40,128"]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:6.0) Gecko/20100101 Firefox/6.0

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