Question

Find the exact surface area of a sphere with a diameter of 13cm

Answer 1

Area = 706.8583471

Step-by-step explanation:

The used law to measure the surface area of the sphere is

`area \: = 4\pi \: {r}^(2)`

Where (r) is the radius. The radius is half the diameter, so it will be half 13 which is equal to 7.5. By using this law:

`4\pi \: {7.5}^(2) = 706.8583471`

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Answer 2

A = 530.929158457