To create an object to display at the Art Museum of Boston, Colleen creates a solid of revolution by taking the region in the first quadrant between the parabola y = x², the x-axis, and the line x = 9 and revolving this region around the x-axis. The volume of Colleen's object is Show or upload y 4

n the mid-20th century, engineers constructed a series of canals to move irrigation water from water sources to farming communities throughout the western United States. The volume of water a canal an move is partially dependent on its cross-sectional area. Suppose a canal is trapezoidal, 35.0 ft across the top and 15.0 ft across the bottom, with a planned depth of water of 10.0 ft as shown in the gure. Find the cross-sectional area of the canal when it is full (in ft). (Use the rules for working with measurements to give your answer to the appropriate accuracy and/or precision.) 35.0 ft 10.0 ft 15.0 ft