唔該！幫幫忙解答我以下2個問題唔該!

xylitol25

唔係好明個問題同"答案"
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  `6 X* i" w8 k( K' r+ |% R1. http://nz.youtube.com/watch?v=lj3iNxZ8Dww&feature=related7 s1 v2 H( Z2 x" Y
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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2 Y- w: r& F, a8 M2 x9 sCaitlin 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."0 ]# O$ {& k% J2 j8 s( G" k

! |0 ?( y2 e* l  ^4 Y2 s' R$ b2. http://nz.youtube.com/watch?v=itjlj6i9XFo
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) x7 L- f9 v9 Y# Z# lQ:"How many feet are in 2 1/2 yards?) f. u& W0 w' a9 W. J8 y  n
A:"78"
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WHY NOT IS 7.5? I THINK IS 3 FEETS EQUAL 1 YARD?