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"
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; G5 o9 t4 w' d% R+ y, H5 {1. http://nz.youtube.com/watch?v=lj3iNxZ8Dww&feature=related- |7 `# ]' y6 I
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?", [8 J- b5 I8 Q' s) m0 Q
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' _% z) k$ Q+ ^' ^* bCaitlin 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."+ _) c) G9 g  v0 n2 B3 k! P( D
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2. http://nz.youtube.com/watch?v=itjlj6i9XFo
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Q:"How many feet are in 2 1/2 yards?1 b$ n) n. g! k2 G2 {2 D
A:"78"
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WHY NOT IS 7.5? I THINK IS 3 FEETS EQUAL 1 YARD?