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anonymous

  • one year ago

HELP PLEASE!! As the second hand of the clock rotates the large gear turns 40 degrees. AE = 7 inches, and CD = 5 inches. AC, the length of the chain between the gears is 23 inches. How far does the chain around the circumference of the large gear move to the nearest tenth of an inch? (Enter only the number.)

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    CAN SOMEONE EXPLAIN IT STEP BY STEP PLEASE?

  3. anonymous
    • one year ago
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    @Kainui @Hero @iambatman @ganeshie8 @pooja195

  4. anonymous
    • one year ago
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    @Vampdie2

  5. anonymous
    • one year ago
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    @Goose.

  6. anonymous
    • one year ago
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    @Learner11

  7. anonymous
    • one year ago
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    @dan815

  8. anonymous
    • one year ago
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    @henrry123 @americansniper12 @Vampdie2 @MikaTadashi @Elsa213 @SyedMohammed98

  9. anonymous
    • one year ago
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    @haleyright @misty_fox @mm3591 @Mehek14

  10. dan815
    • one year ago
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    okay so

  11. dan815
    • one year ago
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    the chain is dragged along the smaller gear as it turns 40 degrees

  12. dan815
    • one year ago
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    what is the distance the chain moved?

  13. dan815
    • one year ago
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    |dw:1441399747422:dw|

  14. dan815
    • one year ago
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    so u see the arc length of that thing

  15. dan815
    • one year ago
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    |dw:1441399865127:dw|

  16. dan815
    • one year ago
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    can you find the arc length?

  17. dan815
    • one year ago
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    hint the circumferece of the whole circle is 2pi*r thats for 360 degrees so for 40 degrees how much should it be

  18. anonymous
    • one year ago
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    I still dont understand it!

  19. dan815
    • one year ago
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    okay lets start with the smaller piece all by itself

  20. anonymous
    • one year ago
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    ok

  21. dan815
    • one year ago
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    |dw:1441400103489:dw|

  22. dan815
    • one year ago
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    x is that arc length for 40 degrees

  23. anonymous
    • one year ago
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    this is confusing im sorry

  24. dan815
    • one year ago
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    how about the circumference of the circle do you know that formula

  25. anonymous
    • one year ago
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    2pi*r

  26. dan815
    • one year ago
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    right okay plug in for radius

  27. dan815
    • one year ago
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    what si the whole circumferece of the small circle?

  28. anonymous
    • one year ago
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    251.33?

  29. anonymous
    • one year ago
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    31.42?

  30. dan815
    • one year ago
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    ya ist 10pi so 31.42 approximately

  31. dan815
    • one year ago
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    now 40 degrees is what fraction of 360

  32. dan815
    • one year ago
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    if you split 360 into parts of 40

  33. anonymous
    • one year ago
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    9

  34. dan815
    • one year ago
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    right so 40 is 1/9th of 360

  35. dan815
    • one year ago
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    you can also split the circumference which belong to the 360 degrees in 9 ways so u can see how much of that circumference belongs to each 40 degrees

  36. dan815
    • one year ago
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    1/9th of 31.42 = length of x

  37. dan815
    • one year ago
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    to write it with our rounding its 10pi/9

  38. dan815
    • one year ago
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    without rounding

  39. dan815
    • one year ago
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    |dw:1441402206061:dw|

  40. anonymous
    • one year ago
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    40

  41. anonymous
    • one year ago
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    31.4

  42. dan815
    • one year ago
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    @Jhannybean

  43. dan815
    • one year ago
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    she will teach you

  44. anonymous
    • one year ago
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    ok

  45. Jhannybean
    • one year ago
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    youre pretty much done, you found x, right?

  46. anonymous
    • one year ago
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    is x 31.4?

  47. anonymous
    • one year ago
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    i'm not sure if this answer is right but is it 4.9? @Jhannybean @dan815

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