# Previous answers scalcet7 154025 use polar

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11. 1/1 points | Previous Answers SCalcET7 15.4.025. Use polar coordinates to find the volume of the given solid. + y 2 + y 2 x 2 + y 2 = 2 2 2 2
12. 1/1 points | Previous Answers SCalcET7 15.4.030. Evaluate the iterated integral by converting to polar coordinates. Solution or Explanation a 0 7 x 2 y dx dy 0 a 2 y 2 = = = cos 3 θ r 5 = cos 3 π cos 3 a 5 = a 5 π π /2 7 ( r cos θ ) 2 ( r sin θ ) r dr d θ a 0 π π /2 7 r 4 cos 2 θ sin θ dr d θ a 0 cos 2 θ sin θ d θ π π /2 7 r 4 dr a 0 1 3 π π /2 7 5 a 0 1 3 π 2 7 5 7 15
13. 1/1 points | Previous Answers SCalcET7 15.4.031. Evaluate the iterated integral by converting to polar coordinates. 14. 1/1 points | Previous Answers SCalcET7 15.4.035. A swimming pool is circular with a 30 -ft diameter. The depth is constant along east-west lines and increases linearly from 4 ft at the south end to 9 ft at the north end. Find the volume of water in the pool. (Round your answer to the nearest whole number.) 4595 4595 ft 3 dy 2 3 d θ d θ
15. 2/2 points | Previous Answers SCalcET7 15.4.036. An agricultural sprinkler distributes water in a circular pattern of radius 85 ft. It supplies water to a depth of feet per hour at a distance of r feet from the sprinkler. (a) If what is the total amount of water supplied per hour to the region inside the circle of radius centered at the sprinkler? R