Question

Surface area=
Help me please thanks so much :))

Answer 1

324
`\pi` unit^2

Explanation:

The formula for finding the surface area of a sphere is:
`A = 4\pi r^2`

--> A = Surface area of the sphere

--> r = Radius of the sphere

The image shows that the radius of the sphere is 9.

All we need to do is to replace r with 9.

--> A = 4
`\pi`9^2

--> A = 4
`\pi`81

--> A = 324
`\pi`

So that is your final answer! 324
`\pi` unit^2

--> It is unit^2 since it is an area, not a volume.

+ I'm leaving this as
`\pi`, since the question is asking for the exact value, not the ones that are rounded up.

Answer 2

324
`\pi` units³

Explanation:

Surface Area of Sphere = 4
`\pi`r²; where 'r' is the radius of the sphere.

4
`\pi`r² =

4
`\pi`9² =

4
`\pi`81 =

324
`\pi` units³