Today we continued in the chapter on 3D figures. We recalled on the board the formulas we need. We recalled how to find the surface area and volume of spheres, cylinders, and cones. Then we did an application activity. We looked up the diameter of a tennis ball to be 6.54 centimeters. Then we considered a tennis ball can with 3 balls stacked inside touching end-to-end. I asked Carson to determine the amount of sand we would need to fill up the can completely. Carson worked to determine the volume of each sphere. Then he found the volume of the cylinder. Then he subtracted the volumes of the spheres from the entire volume.