What is the surface area if this sphere?
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Answer:
The surface area of the sphere is approximately equal to 379.9 square centimetres.
Step-by-step explanation:
The surface are a of a sphere with respect to radius is 4πr². We're given the diameter, of 11 cm, so we know that the radius is 5.5 cm.
With that we can find the surface area:
[tex]a = 4\pi r^2\\a = 4\pi (5.5cm)^2\\a = 4\pi \times 30.25cm^2\\a = \pi \times 121cm^2\\a \approx 3.14 \times 121cm^2\\a \approx 379.9cm^2[/tex]