Find the exact length of the curve. 1 + 12+2, y = 2 + 8+3, osts4 16V 17 XFind dy/dx and d2y/dx2. x = t2 + 4, y = +2 + 7t dy 2t + 7 = dx 2t day co / CO dx 2 X For which values of t is the curve concave upward? (Enter your answer using interval notation.)Find dy/dx and d2y/dx2. x=e, y= te-t dy 1 -t dx e 2t day 2t - 3 = dx 2 est For which values of t is the curve concave upward? (Enter your answer using interval notation.) N/ CO XSketch the curve with the given polar equation by first sketching the graph of r as a function of 6 in Cartesian coordinates. r26=9 The figure shows the graph of r as a function of 0 in Cartesian coordinates. Use it to sketch the corresponding polar curve. 5 4 3 1 3 AT NIN 2 2 7