Could somebody please help me with finding the radius please ? ?

Question

agent47 · Answer

could you post the actual question please ? ?

anonymous · Answer

Radius of what ?

anonymous · Answer

a sphere please ??

anonymous · Answer

$$x^2+y^2 =1$$

anonymous · Answer

@Nancy_Lam , not to nit-pick but that's the equation of a unit circle, meaning it has a fixed radius of 1.  You're very close.

$$x^2+y^2=radius^2$$

For a sphere however it's different altogether because it's 3D:
$$(x - h)^2 + (y - j)^2 + (z - k)^2 = radius^2 $$
This is with center (h,j,k), which is (0,0,0) if centered on the origin, and (x,y,z) is a point on the surface of the sphere.

anonymous · Answer

Does this help resolve your question @sexygirl12?  :-)

anonymous · Answer

|dw:1340047343762:dw|um...?? idk the question is use the formulas below to find the radius of a sphere with the given surface area:

anonymous · Answer

@agentx5 it also helps

anonymous · Answer

$$\huge Area_{suface} = 4\pi r^2$$

anonymous · Answer

but im not sure if that evolves around my answer because im not sure if my answer is right , i got 8inches

anonymous · Answer

.....???

anonymous · Answer

@agentx5 are you there??? :-)

anonymous · Answer

Are you given the area?

anonymous · Answer

yes

anonymous · Answer

@Agent47 said it best, post the question please, the whole question.  What are you given?  What are you asked to find?

anonymous · Answer

The formulas I gave you will allow you to find the sphere's surface area or radius, or give you the equation for a sphere based on it's center and radius.