Janice works at a cell phone company. she wants to make a presentation to her team about the features of a new phone. she makes a scale drawing of the phone using a scale of 1 inch to 0.5 centimeter. the length of the scaled drawing is 28 inches, and its width is 15 inches. what are the actual dimensions of the phone?
the length is 14 inches, and the width is 7.5 inches.
the length is 56 inches, and the width is 30 inches.
the length is 56 centimeters, and the width is 30 centimeters.
the length is 14 centimeters, and the width is 7.5 centimeters.
the length is 12 centimeters, and the width is 5.5 centimeters.

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)