1. 
r(t) = sint+cost+t
K = |r'(t) x r''(t)|/r'(t)^3
r'(t)=[cost -sint 1]
r''(t)=[-sint -cost 0]
r' x r''
= [cost -sint -1]
--> sqrt(cost^2+sint^2+1)
= sqrt(2)/sqrt(2)^3
= 0.5

2. 
r(t)=[t t^2 5]
v(t) = r'(t) = 
[1 2t 0]
a(t) = r''(t) =
[0 2 0]
speed = magnitude of v(t)
= sqrt(1+4t^2)