SOLUTION: Here is my word problem, need to write an equation: A lanscape architect wants to position a tree 3 meters east and 9 meters north of a stong marker in a garden. When the tree

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Question 79854: Here is my word problem, need to write an equation:
A lanscape architect wants to position a tree 3 meters east and 9 meters north of a stong marker in a garden. When the tree is full grown, its branches will be roughly circular with a diameter of about 4 meters. Write an equation representing the outside of the grown tree's branches relative to the stone.
I understand how to do equations with center points and endplate points, but I just don't see how to do this. Thanks
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
think of the marker as the origin (0,0) ... you need an equation for a circle of radius 2, centered at (3,9)

%28%28E-3%29%5E2%29%2B%28%28N-9%29%5E2%29=4