The surface area of a sphere is given by the formula 4πr\(^2\), where r is the radius of the sphere. If the surface area of the sphere is 154 cm\(^2\), we can use this formula to find the radius:

4πr\(^2\) = 154

r\(^2\) = 154/(4π)

r = √(154/(4π))

Using a calculator, we can approximate this value to be r ≈ 3.50 cm.

Therefore, the radius of a sphere whose surface area is 154 cm\(^2\) is approximately 3.50 cm.