SOLUTION: (I hope this is the right topic. Sorry if it isn't.) A. Rewrite the forumula for the circumference of a circle, C=2x3.14xR, so that you can easily calculat the radius of a colum

Algebra ->  Algebra  -> Circles -> SOLUTION: (I hope this is the right topic. Sorry if it isn't.) A. Rewrite the forumula for the circumference of a circle, C=2x3.14xR, so that you can easily calculat the radius of a colum      Log On

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Question 524389: (I hope this is the right topic. Sorry if it isn't.)
A. Rewrite the forumula for the circumference of a circle, C=2x3.14xR, so that you can easily calculat the radius of a column given its circumference.
B. What is the radius, to the nearest tenth of a foot, of a column that has a circumference of 7 feet? 8 feet? 9 feet?

Answer by ankor@dixie-net.com(15645) About Me  (Show Source):
You can put this solution on YOUR website!
2%2Api%2Ar = C
Divide both sides by 2%2Api, results:
r = C%2F%282%2Api%29
or if you prefer
r = C%2F%282%2A3.14%29
r = C%2F6.28
:
B. What is the radius, to the nearest tenth of a foot, of a column that has a circumference of 7 feet?
r = 7%2F6.28
r = 1.1 ft
:
You can do 8 feet? 9 feet?