r=0.625

The surface area of a sphere is equal to 4 times Pi π times the radius squared.

4π⋅(radius)2

Substitute the value of the radius r=0.625 into the formula to find the surface area of the sphere. Pi π is approximately equal to 3.14.

4⋅π⋅0.6252

Raise 0.625 to the power of 2.

4π⋅0.390625

Multiply 0.390625 by 4.

1.5625π

Multiply 1.5625 by π.

4.90873852

4.90873852

Find the Surface Area sphere (0.625)