Find the length of the curve r(t)=5cos(t),5sin(t),4tr(t)=5cos(t),5sin(t),4t for 2t4-2t4 Give your answer to two decimal places

Find the curvature of the curve r(t)=2t,4t5,t2r(t)=2t,4t5,-t2 at the point t=2t=2. Give your answer to 2 decimal places.