Claire is making new oushion covers for a chair. There are three sizes of cushions on the choir What is the surface area of the arm rest cushion?
21
Not for Arm Rost
10 in
10 in
10
10 w
15 in
10 in
10 in
18 in
10 in
2116
A 320 square inches
8. 200 square inches
C. 990 square inches
D. 846 square inches

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radii and altitudes is 2: 1? submit

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)