anonymous
  • anonymous
Help.. I need details to help me understand.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
substitute 37.7 meters instead of C. What do you get?
anonymous
  • anonymous
\[\frac{ c }{ 2\pi } = r\] where C is your circumference
anonymous
  • anonymous
I'm confused

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More answers

Vocaloid
  • Vocaloid
start with C = 2πr replace "C" with 37.7
Vocaloid
  • Vocaloid
37.7 = 2πr now solve for r
anonymous
  • anonymous
i dont know how to do this
Vocaloid
  • Vocaloid
divide both sides by 2π
anonymous
  • anonymous
... how do you divide that the π confuses me
Vocaloid
  • Vocaloid
π is just a number, it's equal to about 3.14
Vocaloid
  • Vocaloid
you know how to divide 37.7 by 2, right? you also know how to divide 37.7 by 3.14, right? just do both at the same time
anonymous
  • anonymous
18.85? & I'm unsure how to divide the second one ?
Vocaloid
  • Vocaloid
18.85/3.14 = ? (use a calculator)
anonymous
  • anonymous
\[\frac{ 37.7 }{ 6.2831 }\]
anonymous
  • anonymous
it gives me a big number
anonymous
  • anonymous
I'm clearly horrible at math
anonymous
  • anonymous
\[\frac{ 37.7 }{ 2*3.14.159 }\]
anonymous
  • anonymous
err seems I added 1 to many . there... but that will give you your r value
Vocaloid
  • Vocaloid
enter "37.7", then press the divide button, then enter "6.2831", then press the enterbutton/equal sign
anonymous
  • anonymous
it should be #.xxxxxxxxx but you can ignore the xxxxxxx part as they are mostly 0
Vocaloid
  • Vocaloid
or just use an online calculator https://www.bing.com/search?q=37.7%2F6.2831&PC=U316&FORM=CHROMN
anonymous
  • anonymous
6.0002228199455698 ?
anonymous
  • anonymous
yes
Vocaloid
  • Vocaloid
good! that s the radius
anonymous
  • anonymous
but 6 will do
anonymous
  • anonymous
okay? still kind of lost
Vocaloid
  • Vocaloid
you're done, you just found that the radius is equal to 6
anonymous
  • anonymous
I'm just a little confused how we got there lol
anonymous
  • anonymous
the formula you were given was C = 2πr
anonymous
  • anonymous
using algebra we moved our variables around to solve for r since C was given. We divided 2π from both sides like so C/2π = 2πr/2π the 2π on the side of 2πr cancelled leaving us with C/2π = r and from there you just plugged in values C = 37.7 and 2*(3.1415) which is the value of π
anonymous
  • anonymous
hope that helps :)
anonymous
  • anonymous
i think i'm dumb cause i dont get it lol
Vocaloid
  • Vocaloid
|dw:1444525785727:dw|
Vocaloid
  • Vocaloid
|dw:1444525809654:dw|
Vocaloid
  • Vocaloid
do you understand this part?
anonymous
  • anonymous
yes
Vocaloid
  • Vocaloid
good, now the problem says that the circumference is 37.7, so we replace "C" with 37.7 do you understand that part?
anonymous
  • anonymous
yes
Vocaloid
  • Vocaloid
good, now we want to find the radius
Vocaloid
  • Vocaloid
so we want r by itself on the other side
Vocaloid
  • Vocaloid
|dw:1444526056008:dw|
Vocaloid
  • Vocaloid
do you understand that part?
anonymous
  • anonymous
yeah
anonymous
  • anonymous
it's making more sense
Vocaloid
  • Vocaloid
good, so r = C/(2π) = 6
anonymous
  • anonymous
\[\frac{ 1 }{ 2π } * C = 2πr * \frac{ 1 }{2π} \rightarrow r = \frac{ C }{ 2π } \]
anonymous
  • anonymous
heh guess I should have made a picture :)
anonymous
  • anonymous
I GET IT NOW!

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