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"
  X7 X" b3 @. D1 z8 n+ Q- D3 U8 {1 Q
1. http://nz.youtube.com/watch?v=lj3iNxZ8Dww&feature=related5 R( l6 u# K8 d" s% q  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?"# F. ?* V* d( c! F

2 _8 ?+ }3 i. q3 K
" p& v' \2 }9 v$ G: s$ 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."
+ s$ G+ O; K) c' o7 r6 ^1 R# y3 y9 K3 X; o0 F  S; N
2. http://nz.youtube.com/watch?v=itjlj6i9XFo+ A/ P* f5 [% S4 k% d9 W
) q; c2 L5 v6 `
Q:"How many feet are in 2 1/2 yards?, R9 [& \3 R' ~) z& `0 {) @2 }
A:"78"! a- n7 Y( W  T6 N5 g$ m5 D. b

8 u9 y( z  [  C/ B  m* eWHY NOT IS 7.5? I THINK IS 3 FEETS EQUAL 1 YARD?