1. The problem statement, all variables and given/known data r(t)=ti+2tj+(t^2-3)k or r(t)=(t, 2t, t^2-3) 0≤t≤2 2. Relevant equations arc lenght formula ∫[the scalar of dr/dt] I know I can calculate the arc length through the equation above, but the questions asks for me to utilize this formula. ∫√(t^2+a^2) dt = .5t√(t^2+a^2) + .5a^2 times ln(t+√(t^2+a^2)) 3. The attempt at a solution I couldn't get far on this, but i think it has to do something with another alternative to get the arc length. If it is difficult reading the problem, i also have a picture of it.