Hello!
The surface area of a sphere can be found using this equation: SA = 4πr².
The radius is half the diameter. So, half of √29 is √29 / 2, in simple terms.
SA = 4π(√29/2)²
SA = 4π(7.25)
SA = 4(7.25)π
SA = 29π
SA = 91.10618...
Therefore, the surface area of this sphere is 91.11 units².
Without multiplying π, the surface area is 29π units².
If the question asked substitute π for 3.14, the answer is 91.06 units².