Question

What is the surface area of a sphere with radius 8? Use 3.14 for pi and round your answer to the nearest hundredth if necessary.​

Answer 1

803.84cm²

Solution

Area of a sphere = 4πr²

When we put the given values we get

Area of a sphere = 4x3.14x8²

Area of a sphere = 4x3.14X16

= 804.25cm²

Rounding to the nearest hundredth we get,

803.84cm²

Answer 2

The formula for the surface area of a sphere with radius r is 4πr^2. Plugging in the given radius of 8, we get:

Surface area = 4π * 8^2 = 4π * 64 = 256π

Using an approximate value of π = 3.14, the surface area of the sphere is approximately:

256 * 3.14 = 803.84

Rounding to the nearest hundredth, the surface area of the sphere is approximately 803.84 square units.