SOLUTION: The area of a circle is given by ( π k^2 -12k π + 36 π ) square inches. What is the radius of the circle? A.)k+3 B.)k+4 C.)k-6 D.)k-12

Algebra ->  Surface-area -> SOLUTION: The area of a circle is given by ( π k^2 -12k π + 36 π ) square inches. What is the radius of the circle? A.)k+3 B.)k+4 C.)k-6 D.)k-12      Log On


   



Question 724330: The area of a circle is given by ( π k^2 -12k π + 36 π ) square inches. What is the radius of the circle?
A.)k+3 B.)k+4 C.)k-6 D.)k-12

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
( π k^2 -12k π + 36 π )

π(k^2 -12k + 36)

π(k-6)^2

It's in the form π*r^2, so r = k-6