Final answer:
The surface area of the sphere with a diameter of 8 inches is b) 64π square inches.
Step-by-step explanation:
To find the surface area of a sphere, we use the formula A = 4πr², where r is the radius of the sphere.
In this case, the diameter of the sphere is given as 8 inches, so the radius is half the diameter which is 4 inches.
Substituting the value of r = 4 inches into the formula, we get:
A = 4π(4 inches)² = 4π(16 square inches) = 64π square inches
Therefore, the surface area of the sphere is 64π square inches, so the correct answer is b) 64π sq. inches.