Posted by **Tweets** on Tuesday, August 23, 2011 at 5:50am.

The surface area of a sphere is given by the formula 4pi r2, where is it's radius. Although the shape of earth is noth exactly spherical, it has an average radius of 3960 miles. Estimate the surface area of earth.

## Answer This Question

## Related Questions

- Algebra 1 - Earth has a radius of about 6.4 x 10 to the 6th power m. Approximate...
- basic calculus - The area of the surface of a sphere of radius r is 4?r^2. If ...
- math - The earth has a radius of 6,380 km. The formula for the volume of a ...
- Calculus Homework - You are blowing air into a spherical balloon at a rate of 7...
- Math - A spherical balloon with a surface area of 36pi square inches is inflated...
- calc: relative error - The circumference of a sphere was measured to be 77 cm ...
- math - direct variation the surface area of a sphere varies directly as the ...
- Geometry/Algebra/Calculus - Why isn't the surface area of a sphere with radius r...
- Calculus I - The volume of a sphere is changing at a rate of 8pi cm/sec. What is...
- calculus *improper integrals* - A hole of a radius of 1cm is pierced in a sphere...

More Related Questions