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OpenStudy (anonymous):

The circumference of a circular painting is 53.38 feet. What is the radius of the painting? Use 3.14 for pi and do not round your answer.

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Parth (parthkohli):

Do you know the formula for circumference?

OpenStudy (anonymous):

pi times diameter

Parth (parthkohli):

Hmm exactly :D

Parth (parthkohli):

Or you could say 2 times radius times pi

Parth (parthkohli):

2 times radius is same as diameter :P

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OpenStudy (anonymous):

8.49... http://www.wolframalpha.com/input/?i=radius+for+circumference+of+53.38

Parth (parthkohli):

So you can isolate r.

Parth (parthkohli):

\(\Large \color{MidnightBlue}{\Rightarrow 2 * 3.14 * r = 53.38 }\) \(\Large \color{MidnightBlue}{\Rightarrow 6.28 * r = 53.38 }\) \(\Large \color{MidnightBlue}{\Rightarrow r = 8.49569 }\)

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