help please?

label Mathematics
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Screen%20Shot%202014-08-05%20at%209.48.1
Aug 6th, 2014

(a*24)^1/2= 12

a*24=144

a=6

Aug 6th, 2014

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Aug 6th, 2014
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Aug 6th, 2014
Jun 26th, 2017
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