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chancemorris123
 one year ago
Find the circumference of a circle whose area is /.
A.
B.
C.
D.
chancemorris123
 one year ago
Find the circumference of a circle whose area is /. A. B. C. D.

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jdoe0001
 one year ago
Best ResponseYou've already chosen the best response.1\(\bf \textit{area of a circle}=\pi r^2\qquad area=60\pi \qquad thus \\ \quad \\ 60\pi =\pi r^2\impliedby \textit{solve for "r"}\) what does that give you for "r"? or radius

jdoe0001
 one year ago
Best ResponseYou've already chosen the best response.1\(\bf \textit{area of a circle}=\pi r^2\qquad area=60\pi \qquad thus \\ \quad \\ 60\pi =\pi r^2\implies \cfrac{60\cancel{\pi }}{\cancel{\pi }}=r^2\implies \sqrt{60}=\sqrt{r^2}\implies \sqrt{60}=r\)

jdoe0001
 one year ago
Best ResponseYou've already chosen the best response.1that was close though

jdoe0001
 one year ago
Best ResponseYou've already chosen the best response.1so now that we know what "r" is let us use it in the circumference formula then \(\bf circumference=2\pi r\qquad \sqrt{60}=r\qquad then \\ \quad \\ circumference=2\pi \left( \sqrt{60} \right)\)

jdoe0001
 one year ago
Best ResponseYou've already chosen the best response.1and then you'd want to simplify that 60, see if you can squeeze something out of the radical

jdoe0001
 one year ago
Best ResponseYou've already chosen the best response.1one may note that \(\huge \pi \ne pie\) but yours is tastier though

chancemorris123
 one year ago
Best ResponseYou've already chosen the best response.0so is it 30pie

chancemorris123
 one year ago
Best ResponseYou've already chosen the best response.0so is it 30 pie?

jdoe0001
 one year ago
Best ResponseYou've already chosen the best response.1\(\bf circumference=2\pi r\qquad \sqrt{60}=r\qquad then \\ \quad \\ circumference=2\pi \left( \sqrt{60} \right) \\ \quad \\ {\color{brown}{ 60\to 2\cdot 2\cdot 15\to 2^2\cdot 15 }}\qquad thus \\ \quad \\ 2\pi \left( \sqrt{60} \right)\implies 2\pi \left( \sqrt{{\color{brown}{ 2^2\cdot 15}}} \right)\implies 2\pi \sqrt{2^2}\sqrt{15}\)

chancemorris123
 one year ago
Best ResponseYou've already chosen the best response.0so its 2square root 5
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