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anonymous

  • one year ago

Help.. I need details to help me understand.

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  1. anonymous
    • one year ago
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    substitute 37.7 meters instead of C. What do you get?

  2. anonymous
    • one year ago
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    \[\frac{ c }{ 2\pi } = r\] where C is your circumference

  3. anonymous
    • one year ago
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    I'm confused

  4. Vocaloid
    • one year ago
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    start with C = 2πr replace "C" with 37.7

  5. Vocaloid
    • one year ago
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    37.7 = 2πr now solve for r

  6. anonymous
    • one year ago
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    i dont know how to do this

  7. Vocaloid
    • one year ago
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    divide both sides by 2π

  8. anonymous
    • one year ago
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    ... how do you divide that the π confuses me

  9. Vocaloid
    • one year ago
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    π is just a number, it's equal to about 3.14

  10. Vocaloid
    • one year ago
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    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

  11. anonymous
    • one year ago
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    18.85? & I'm unsure how to divide the second one ?

  12. Vocaloid
    • one year ago
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    18.85/3.14 = ? (use a calculator)

  13. anonymous
    • one year ago
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    \[\frac{ 37.7 }{ 6.2831 }\]

  14. anonymous
    • one year ago
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    it gives me a big number

  15. anonymous
    • one year ago
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    I'm clearly horrible at math

  16. anonymous
    • one year ago
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    \[\frac{ 37.7 }{ 2*3.14.159 }\]

  17. anonymous
    • one year ago
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    err seems I added 1 to many . there... but that will give you your r value

  18. Vocaloid
    • one year ago
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    enter "37.7", then press the divide button, then enter "6.2831", then press the enterbutton/equal sign

  19. anonymous
    • one year ago
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    it should be #.xxxxxxxxx but you can ignore the xxxxxxx part as they are mostly 0

  20. Vocaloid
    • one year ago
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    or just use an online calculator https://www.bing.com/search?q=37.7%2F6.2831&PC=U316&FORM=CHROMN

  21. anonymous
    • one year ago
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    6.0002228199455698 ?

  22. anonymous
    • one year ago
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    yes

  23. Vocaloid
    • one year ago
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    good! that s the radius

  24. anonymous
    • one year ago
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    but 6 will do

  25. anonymous
    • one year ago
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    okay? still kind of lost

  26. Vocaloid
    • one year ago
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    you're done, you just found that the radius is equal to 6

  27. anonymous
    • one year ago
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    I'm just a little confused how we got there lol

  28. anonymous
    • one year ago
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    the formula you were given was C = 2πr

  29. anonymous
    • one year ago
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    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

  30. anonymous
    • one year ago
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    hope that helps :)

  31. anonymous
    • one year ago
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    i think i'm dumb cause i dont get it lol

  32. Vocaloid
    • one year ago
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    |dw:1444525785727:dw|

  33. Vocaloid
    • one year ago
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    |dw:1444525809654:dw|

  34. Vocaloid
    • one year ago
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    do you understand this part?

  35. anonymous
    • one year ago
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    yes

  36. Vocaloid
    • one year ago
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    good, now the problem says that the circumference is 37.7, so we replace "C" with 37.7 do you understand that part?

  37. anonymous
    • one year ago
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    yes

  38. Vocaloid
    • one year ago
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    good, now we want to find the radius

  39. Vocaloid
    • one year ago
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    so we want r by itself on the other side

  40. Vocaloid
    • one year ago
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    |dw:1444526056008:dw|

  41. Vocaloid
    • one year ago
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    do you understand that part?

  42. anonymous
    • one year ago
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    yeah

  43. anonymous
    • one year ago
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    it's making more sense

  44. Vocaloid
    • one year ago
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    good, so r = C/(2π) = 6

  45. anonymous
    • one year ago
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    \[\frac{ 1 }{ 2π } * C = 2πr * \frac{ 1 }{2π} \rightarrow r = \frac{ C }{ 2π } \]

  46. anonymous
    • one year ago
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    heh guess I should have made a picture :)

  47. anonymous
    • one year ago
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    I GET IT NOW!

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