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gabbyalicorn

  • one year ago

Bill measures the circumference of a circular fish pond to be 28 ft. What is the diameter of the fish pond, rounded to the nearest foot? Use 3.14 to approximate pi. So, 3.14 x 28 x 2 / 2 ? am i right on how i am doing this?

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  1. tkhunny
    • one year ago
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    You already know the circumference. There should be some division in there in order to find the diameter or the radius.

  2. gabbyalicorn
    • one year ago
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    yes, after i get the answer which would be 175.84 then i would divide it by 2 which would be 87.92

  3. gabbyalicorn
    • one year ago
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    @tkhunny

  4. gabbyalicorn
    • one year ago
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    am i right?

  5. Michele_Laino
    • one year ago
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    hint: If C is the measure of the circumference, and D is the measure of the diameter, then we can write this: \[\Large C = 3.14 \times D\] so we have: \[\Large D = \frac{C}{{3.14}} = \frac{{28}}{{3.14}} = ...feet\]

  6. tkhunny
    • one year ago
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    You didn't listen. Why would the diameter be greater than the circumference. Circumference = 2 * Radius * pi Circumference = Diameter * pi Rethink!

  7. gabbyalicorn
    • one year ago
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    brb for a sec

  8. gabbyalicorn
    • one year ago
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    okay, back

  9. gabbyalicorn
    • one year ago
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    3.14 / 28 ?

  10. Michele_Laino
    • one year ago
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    no, please look at formulas of @tkhunny, or at my formulas above

  11. gabbyalicorn
    • one year ago
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    i did

  12. Michele_Laino
    • one year ago
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    we have: \[\Large D = \frac{C}{{3.14}} = \frac{{28}}{{3.14}} = ...feet\]

  13. gabbyalicorn
    • one year ago
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    yes, |dw:1433357017617:dw|

  14. Michele_Laino
    • one year ago
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    yes! that's right!

  15. gabbyalicorn
    • one year ago
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    but i did say that "3.14 / 28 ?"

  16. Michele_Laino
    • one year ago
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    no, it is 28/3.14=...?

  17. gabbyalicorn
    • one year ago
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    8.9171974522....

  18. Michele_Laino
    • one year ago
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    ok!

  19. Michele_Laino
    • one year ago
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    so what is your answer?

  20. gabbyalicorn
    • one year ago
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    8.9171974522....?

  21. Michele_Laino
    • one year ago
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    you have to round off that value to the nearest foot

  22. gabbyalicorn
    • one year ago
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    8.917?

  23. Michele_Laino
    • one year ago
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    I think 9

  24. gabbyalicorn
    • one year ago
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    oh beacuse you rounded

  25. Michele_Laino
    • one year ago
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    yes! I have rounded to the nearest foot

  26. gabbyalicorn
    • one year ago
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    √ Okay, Thank you for your help!

  27. Michele_Laino
    • one year ago
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    :)

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