Use the integration capabilities of a graphing utility to approximate to two decimal places the area of the surface formed by revolving the polar equation over the given interval about the polar axis. :_ r = 9 cos(20), [0 7'] 4 10.90 x Use a graphing utility to graph the polar equation over the given interval. 6 77/2 1 7/2 -1.0 -0.5 . 0 -1.5 -1.0 -0.5 . 0 0.5 1.0 1.5 2,0 -0.2 0.5 1.0 -0.4 -0.6 -1 -0.8 -1.0 O - 1.2 -21 -3 On/2 1.0 0.5 0.5 1.0 1.5 2. 1.5 1.0 0.5 Use the integration capabilities of the graphing utility to approximate the length of the curve accurate to two decimal places. 4.3 X