唔該！幫幫忙解答我以下2個問題唔該!

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唔係好明個問題同"答案"1 V7 S! q- J0 B: R" z9 q* k
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1. http://nz.youtube.com/watch?v=lj3iNxZ8Dww&feature=related  h* e5 p* B7 d7 {( x. I1 W# w
Aimee Teegarden: "Recent polls have shown a fifth of Americans can't locate the U.S. on a world map. Why do you think this is?"2 y. ?( T0 G5 J/ `

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Caitlin Upton: "I personally believe that U.S. Americans are unable to do so because, uh, some, people out there in our nation don't have maps and, uh, I believe that our, uh, education like such as, uh, South Africa and, uh, the Iraq, everywhere like such as, and, I believe that they should, our education over here in the U.S. should help the U.S., uh, or, uh, should help South Africa and should help the Iraq and the filter-074 countries, so we will be able to build up our future, for our children.". W6 y8 b9 w# {+ V

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1 e+ E0 O6 _$ r3 o+ a! w+ Y1 M: j% l& v; NQ:"How many feet are in 2 1/2 yards?; O0 s# {! [/ W2 D8 t3 y
A:"78"
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WHY NOT IS 7.5? I THINK IS 3 FEETS EQUAL 1 YARD?