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.

just substitute the value of radius to the equation:

surface area = SA = 4*pi*r^2
SA = 4*3.14*(3960^2)
SA = 1.97 * 10^8 miles^2

hope this helps~ :)

To estimate the surface area of the Earth, we can substitute the radius value into the formula for the surface area of a sphere. The formula for the surface area of a sphere is given by 4πr^2, where r is the radius.

Given that the average radius of the Earth is 3960 miles, we can substitute this value into the formula:

Surface area of Earth = 4π(3960)^2

Calculating this expression will give us the estimated surface area of the Earth.

To estimate the surface area of the Earth, we can use the formula given: S = 4πr^2, where S is the surface area and r is the radius of the Earth.

Given that the average radius of the Earth is approximately 3960 miles, we can substitute this value into the formula:

S = 4π(3960)^2

Now we can calculate the surface area using a calculator. The value of π (Pi) is approximately 3.14159.

S = 4 * 3.14159 * (3960)^2

After performing the calculations, the estimated surface area of the Earth is approximately 196,936,300 square miles.

It's important to note that this estimate assumes the Earth is a perfect sphere, while in reality, Earth is slightly flattened at the poles and bulging at the equator, making its shape an oblate spheroid. Nonetheless, this approximation gives us a rough estimate of Earth's surface area.

Let me know if there is anything else I can assist you with!