SOLUTION: What is the radius of a circle with an area of 144 pi? The correct answer is 12 but when I use the formula and divide 144 by pi (3.14), I get 45.8598726 and I don't understand how

Algebra ->  Circles -> SOLUTION: What is the radius of a circle with an area of 144 pi? The correct answer is 12 but when I use the formula and divide 144 by pi (3.14), I get 45.8598726 and I don't understand how      Log On


   

Question 1173912: What is the radius of a circle with an area of 144 pi?
The correct answer is 12 but when I use the formula and divide 144 by pi (3.14), I get 45.8598726 and I don't understand how to get the square root from this big number that equals to 12?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

.

What is the radius of a circle with an area of 144 pi?

  πr^2 = Area

Question States:

  πr^2 = 144π *

   r^2 = 144cross%28pi%29%2Fcross%28pi%29%29    |the πs simply cancel out

    r = 12 units

Wish You the Best in your Studies.