11 POINTS find the radius and area to the nearest hundredth given the circumference is 8.61. show work.

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

Asphere has a diameter of 10 in. what is the volume of the sphere?

What is the area of the triangle 10 13 12