anonymous
  • anonymous
http://media.education2020.com/evresources/2072227_circle_in_circle.png Find the circumference of the larger circle if the area of one of the smaller circles is 48 pi in2. Will give medal and fan and testimony
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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jim_thompson5910
  • jim_thompson5910
" the area of one of the smaller circles is 48 pi in2" use this info to find the radius of the smaller circle
jim_thompson5910
  • jim_thompson5910
Area of a circle \[\Large A = \pi*r^2\]
anonymous
  • anonymous
Would 48 be the diameter?

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More answers

jim_thompson5910
  • jim_thompson5910
no, 48pi is the area
jim_thompson5910
  • jim_thompson5910
A = 48pi
wolf1728
  • wolf1728
48 = PI * r^2 r^2 = 48 / PI
anonymous
  • anonymous
So would i do 48*pi? Im so confused on this :(
jim_thompson5910
  • jim_thompson5910
\[\Large A = \pi*r^2\] \[\Large 48\pi = \pi*r^2\] \[\Large 48 = r^2\] the pi's cancel. Solve for r
anonymous
  • anonymous
So this\[\sqrt{48}=r ^{2}\]
jim_thompson5910
  • jim_thompson5910
more like \[\Large r = \sqrt{48}\]
jim_thompson5910
  • jim_thompson5910
you can simplify that radical
anonymous
  • anonymous
I got 6.92 for the answer
wolf1728
  • wolf1728
Here's a quick answer: It appears that the smaller circle has a radius that is .5 the radius of the larger circle. When calculating area, when you double the size the area increases FOUR times. SO, area of larger circle = 4 * 48 = 192
jim_thompson5910
  • jim_thompson5910
it wants the circumference of the larger circle
anonymous
  • anonymous
Im really sorry that confused me even more :( like all my answer choices are in radical form
wolf1728
  • wolf1728
What are your answer choices?
jim_thompson5910
  • jim_thompson5910
|dw:1436235139053:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1436235225907:dw|
anonymous
  • anonymous
http://media.education2020.com/evresources/2072227_4cb2fce2-9f6e-455d-a731-39e53bec85cd.png
jim_thompson5910
  • jim_thompson5910
|dw:1436235275013:dw|
jim_thompson5910
  • jim_thompson5910
Now use the circumference of a circle formula \[\Large C = 2*\pi*r\] You'll plug in r = 2*sqrt(48)
anonymous
  • anonymous
Ugh...this is not helping me not be confused. Really sorry for taking up so much tome
anonymous
  • anonymous
*time
anonymous
  • anonymous
1 Attachment
jim_thompson5910
  • jim_thompson5910
@ANA789 do you see how I got the values in my drawing?
anonymous
  • anonymous
@jim_thompson5910 Yeah I got that but the answer i got was the same and it was wrong
jim_thompson5910
  • jim_thompson5910
when you plug r = 2*sqrt(48) into that circumference formula, what do you get?
anonymous
  • anonymous
13.85
jim_thompson5910
  • jim_thompson5910
leave it in radical form though
anonymous
  • anonymous
I dont know how to put that in radical form
jim_thompson5910
  • jim_thompson5910
|dw:1436235731159:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1436235759458:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1436235791532:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1436235814441:dw|
jim_thompson5910
  • jim_thompson5910
the only thing left to do here is to simplify the root
anonymous
  • anonymous
Yeah I got 87.06 for that
jim_thompson5910
  • jim_thompson5910
simplify \(\Large \sqrt{48}\) to get ??
jim_thompson5910
  • jim_thompson5910
hint: 48 = 16*3
anonymous
  • anonymous
OH!! I SEE NOW!! OKay then thank you :) I know the answer now haha i feel dumb!
jim_thompson5910
  • jim_thompson5910
its ok, your answer would work if they wanted the approximate result

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