Jenna is planting four circular gardens. she is planting one garden each for tomatoes, carrots, cabbage, and strawberries. each garden will have a fence around it to keep rabbits out. the tomato, carrot, and cabbage gardens will all be the same size. since jenna loves strawberries, the strawberry garden will be larger. it will use the same amount of fencing as the other three gardens combined. she used a total of about 113.04 feet of fencing material.

For every corresponding pair of cross sections, the area of the cross section of a sphere with radius r is equal to the area of the cross section of a cylinder with radius and height 2r minus the volume of two cones, each with a radius and height of r. a cross section of the sphere is and a cross section of the cylinder minus the cones, taken parallel to the base of cylinder, is the volume of the cylinder with radius r and height 2r is and the volume of each cone with radius r and height r is 1/3 pie r^3. so the volume of the cylinder minus the two cones is therefore, the volume of the cylinder is 4/3pie r^3 by cavalieri's principle. (fill in options are: r/2- r- 2r- an annulus- a circle -1/3pier^3- 2/3pier^3- 4/3pier^3- 5/3pier^3- 2pier^3- 4pier^3)