Question

http://screensnapr.com/v/71r7rM.png

Answer 1

Okay, this is how you find the angle:
Cos(theta) = u*v/(||u||*||v||)

Answer 2

u*v is the dot product, which equals:
u1v1+u2v2+u3v3

Answer 3

u*v = 1*2 + (-2)*2 + 2*2 = 2 - 4 + 4 = 2

Answer 4

and sqrt(9)sqrt(12)

Answer 5

thus leading to 78.9 i think

Answer 6

yup

Answer 7

Test is done omg

Answer 8

yay! hi five, now i can sleep!

Answer 9

YES! I only got one question wrong from my multiple choice

Answer 10

AWESOME!

Answer 11

Which leaves 40 pts of extended response questions, So right now Im feeling pretty good!