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"4 K) j( J$ f7 H& {, v5 ~
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1. http://nz.youtube.com/watch?v=lj3iNxZ8Dww&feature=related, w% ^  m5 v) k: I% J) D6 A$ k
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?"
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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."* B# j" f* w$ V/ x7 f. e- y
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2. http://nz.youtube.com/watch?v=itjlj6i9XFo
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% N* A& R/ j- V* ^% k" JQ:"How many feet are in 2 1/2 yards?4 J8 z: h5 z9 x: K% o6 s' v3 }8 Z
A:"78"
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WHY NOT IS 7.5? I THINK IS 3 FEETS EQUAL 1 YARD?