Khan/khan-exercises — Issue #13780: Kinematic equations - Rounding Issue
Author: KhanBugz
Created: 2012-02-14 06:00:48+00:00
State: open
Labels: chrome, win7, wrong-or-unclear

Reporter: thaklos@gmail.com

There appears to be a rounding issue with this question, when I stick the same calculation into Google/Wolphram Alpah it gives me -1450.15, which would round to -1450.2, but the solution is -1450.1.

(((-225)^2) - ((-27.2)^2)) / (2 * (-17.2))

[kinematic_equations.html?seed=96&problem=accelerated](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/kinematic_equations.html?seed=96&problem=accelerated&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/kinematic_equations.html?seed=96&problem=accelerated&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5B%5C%221450.2%5C%22%2C%5C%22m%5C%22%5D%5D%22%2C393%5D%2C%5B%22hint-activity%22%2C%220%22%2C41%5D%2C%5B%22hint-activity%22%2C%220%22%2C54%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5B%5C%22-1450.2%5C%22%2C%5C%22m%5C%22%5D%5D%22%2C191%5D%2C%5B%22hint-activity%22%2C%220%22%2C30%5D%2C%5B%22hint-activity%22%2C%220%22%2C63%5D%2C%5B%22correct-activity%22%2C%22%5B%5B%5C%22-1450.1%5C%22%2C%5C%22m%5C%22%5D%5D%22%2C166%5D%5D)

[[["1450.2","m"]],[["-1450.2","m"]],[["-1450.1","m"]]]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.46 Safari/535.11

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