Q: Sphere r = 7: surface area? Solid hemisphere r = 7: total surface area? Sphere: 4π×49 = 196π ≈ 615.75. Hemisphere CSA: 2π×49 = 98π. Add base circle: 98π+49π = 147π ≈ 461.81. (Sphere = 4 circles: 4×49π = 196π ✓!)