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"* H7 P- P! p! d9 a. U
, h* K+ u% L* n' }
1. http://nz.youtube.com/watch?v=lj3iNxZ8Dww&feature=related
" F' x/ p8 s! o5 @( ?) Q' ?+ {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?"- x! y  \; }* f* `
; m6 {  L9 B% Z$ v% y# w

& Y; ?! O* O4 Y  Y6 @/ D4 RCaitlin 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."
4 F/ g$ T. e2 b8 a- m3 I" ]7 i' f- m. [2 B1 R) @
2. http://nz.youtube.com/watch?v=itjlj6i9XFo8 {4 `8 E1 R. B7 C
! R* Q% L1 R2 Z, [
Q:"How many feet are in 2 1/2 yards?. b! {' ~3 E3 p$ ~! t
A:"78"& G. C4 e7 e9 D

$ P: ?7 \5 r3 U1 yWHY NOT IS 7.5? I THINK IS 3 FEETS EQUAL 1 YARD?