SOLUTION: problem: the area of a circle is 25 meters. find the radius of the circle. i solved to this point. 7.96 m (squared)= r (squared) the books says answer is r=2.82 i need to

Algebra ->  Formulas -> SOLUTION: problem: the area of a circle is 25 meters. find the radius of the circle. i solved to this point. 7.96 m (squared)= r (squared) the books says answer is r=2.82 i need to      Log On


   

Question 7370: problem:
the area of a circle is 25 meters. find the radius of the circle.
i solved to this point.
7.96 m (squared)= r (squared)
the books says answer is r=2.82
i need to understand the step on how they got the answer
thanks.
Found 2 solutions by Earlsdon, cleomenius:
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Well, your first step is just fine:
r%5E2+=+%2825%2F3.14%29
r%5E2+=+7.96+ Now take the square root of both sides.
r+=+sqrt%287.96%29
r = 2.82 meters, approximately.

Answer by cleomenius(959) About Me  (Show Source):
You can put this solution on YOUR website!
The area of a circle is pi * r^2
25 / pi = 7.96.
At this point, you only will need the square root of 7.96.
This is your radius.
2.82
Cleomenius