Posted by **Emma** on Sunday, May 4, 2014 at 8:46pm.

Please help me

1.The surface are of the exterior of hollow rubber ball is 16pi in^2.The rubber is 1/4 inch thick. Find the surface are of the interior of the ball.

2. The length of each side of a cube is 6 inches long. Find the exact area of a sphere inscribed in the cube.

- Geometry -
**Steve**, Sunday, May 4, 2014 at 11:48pm
evidently r=4

so, the inside radius is 3.75

The inside area is 4pi * 3.75^2

The inscribed sphere has a diameter of 6, and a radius of 3.

v = 4/3 pi r^3

plug and chug

also, the length is not six inches long. Each side is six inches long; the length is just six inches.

## Answer This Question

## Related Questions

- Math - When dropped on a hard surface, a rubber ball takes a series of bounces, ...
- physics - A soft synthetic rubber ball of radius 9 cm is submerged to 7.5 m ...
- AP Physics - A ball of mass 0.1 kg is attached to a rubber band, which we can ...
- Physics - A solid rubber ball has a diameter of 8.0 cm. It is released from rest...
- physics - A large air-filled rubber ball is tethered to the bottom of a swimming...
- phyis - a 5 gram rubber ball is released from a height of 7 meter above flat ...
- Physics - A rubber ball is dropped onto a ramp that is tilted at 20 degrees. A ...
- Algebra - 1) the ideal surface area of a rubber ball shipped from the factory is...
- Science - If I put a backward spin on a rubber band ball it returns spinning in ...
- physics - A rubber ball filled with air has a diameter of 21.7 cm and a mass of ...

More Related Questions