SOLUTION: the search for a missing boat covered a circular region with an area of 164km^2. what was the radius of the search region?

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Question 449824: the search for a missing boat covered a circular region with an area of 164km^2. what was the radius of the search region?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
the search for a missing boat covered a circular region with an area of 164km^2. what was the radius of the search region?
:
pi%2Ar%5E2 = 164
r^2 = 164%2Fpi
r^2 = 52.2
r + sqrt%2852.2%29
r = 7.225 km is the radius
;
:
Check solution on a calc: enter pi%2A7.225%5E2 results: 163.99 ~ 164