Let u = [2,2,0], v = [0,2,0]. Find the angle θ between the vectors u and v

486in is correct

step-by-step explanation:

arc length = radius * x ( in radians)

6 * pi = 18 * x

divide by 18 on each side

6 pi / 18 = x

pi/3 = x

the angle is pi / 3 radians

or   60 degrees

you have to find the same variables -3n - 5n so this would be -3n +(-5n) which equals -9n