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niall1Dawesome

  • 3 years ago

Find the surface area for a sphere with a radius of 10 feet. Round to the nearest whole number. 1,256 ft2 4,189 ft2 1,089 ft2 1,568 ft2 Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. 1,257 ft3 4,187 ft3 1,089 ft3 1,568 ft3 Find the surface area for a sphere with a radius of 7 cm. Round to the nearest whole number. 307 cm2 1,436 cm2 1,020 cm2 615 cm2

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  1. niall1Dawesome
    • 3 years ago
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    @qweqwe123123123123111

  2. SithsAndGiggles
    • 3 years ago
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    A = 4πr² V = 4/3 πr³

  3. niall1Dawesome
    • 3 years ago
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    is that too the first question??

  4. niall1Dawesome
    • 3 years ago
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    hey my friend says your really smart qwe

  5. qweqwe123123123123111
    • 3 years ago
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    They're the answers to all 3 of your questions.

  6. qweqwe123123123123111
    • 3 years ago
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    I'm not smart. I have google. :-)

  7. niall1Dawesome
    • 3 years ago
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    1256 is step a for question 1

  8. qweqwe123123123123111
    • 3 years ago
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    1256 is the answer to question 1.

  9. niall1Dawesome
    • 3 years ago
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    thats what i thought cause i did v and i was all liek wait what!!!

  10. qweqwe123123123123111
    • 3 years ago
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    Yes...volume will be somewhat larger... :-)

  11. niall1Dawesome
    • 3 years ago
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    i meant 3rd questions answer is 615.44

  12. qweqwe123123123123111
    • 3 years ago
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    Yes, 615 is question 3. :-)

  13. niall1Dawesome
    • 3 years ago
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    and on volume does he mean 1/3?

  14. ryan123345
    • 3 years ago
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    Area of Sphere Formula

  15. qweqwe123123123123111
    • 3 years ago
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    No. He means 4/3 (same as 1.33333.....) v = 4/3 pi r^3

  16. ryan123345
    • 3 years ago
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    \[A = \frac{ 4 }{ \pi r^2 }\]

  17. ryan123345
    • 3 years ago
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    so for the last one your equation would be.

  18. niall1Dawesome
    • 3 years ago
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    is it c?

  19. ryan123345
    • 3 years ago
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    \[\frac{ 4 }{ \pi(49) }\]

  20. qweqwe123123123123111
    • 3 years ago
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    C? No.

  21. qweqwe123123123123111
    • 3 years ago
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    What's pi * r^3 ?

  22. qweqwe123123123123111
    • 3 years ago
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    You still here?

  23. niall1Dawesome
    • 3 years ago
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    3140 sorry i wasnt there

  24. niall1Dawesome
    • 3 years ago
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    @tafkas77

  25. tafkas77
    • 3 years ago
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    Hi there! You mentioned me; what can I help you with? I'm not sure which question you're looking at. :)

  26. niall1Dawesome
    • 3 years ago
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    the middle one

  27. tafkas77
    • 3 years ago
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    Are you still trying to figure out the answer to #3?

  28. tafkas77
    • 3 years ago
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    .... Hello? @niall1Dawesome You there?

  29. niall1Dawesome
    • 3 years ago
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    sorry my computer was lagging really bad

  30. niall1Dawesome
    • 3 years ago
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    no number 2 i already know 1 and 3

  31. niall1Dawesome
    • 3 years ago
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    @tafkas77

  32. tafkas77
    • 3 years ago
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    Okay. I'm taking a look at this right now. :)

  33. tafkas77
    • 3 years ago
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    Eureka! I have the answer. :) Do you know the formula to calculate this?

  34. niall1Dawesome
    • 3 years ago
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    okay and hey you changed your icon cool

  35. tafkas77
    • 3 years ago
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    Ha ha, yeah. :) I felt like switching it up a bit. So do you know the formula to calculate this?

  36. tafkas77
    • 3 years ago
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    Are you still experiencing lag?

  37. niall1Dawesome
    • 3 years ago
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    a little

  38. niall1Dawesome
    • 3 years ago
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    and well isnt the formula V = 4/3 πr³

  39. tafkas77
    • 3 years ago
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    Okay, I think you are still experiencing a little lag. No worries, I can still help you with this. Hopefully when you see it, you'll get it! :) Perfect formula! :)

  40. niall1Dawesome
    • 3 years ago
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    ya your post jsut showed up

  41. tafkas77
    • 3 years ago
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    So let's plug in the values from your problem: \[v = 4/3 * \pi * 10^3\] \[v = 4/3 * \pi * 1,000\] When you plug this all in (you can do it on a calculator), you'll find that 4/3 = 1.3. so: \[v = 1.3 * 3.14 * 1,000\] And then you'll get your answer. :)

  42. niall1Dawesome
    • 3 years ago
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    ok i will do that

  43. niall1Dawesome
    • 3 years ago
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    4082

  44. tafkas77
    • 3 years ago
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    Sorry; my mistake. You should have rounded 1.3 and input 1.4 (since 1.3333333... is irrational) and you would have gotten 4,187 :)

  45. niall1Dawesome
    • 3 years ago
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    oh lol

  46. tafkas77
    • 3 years ago
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    XD Hey, everyone makes mistakes... ugh... can't say that without thinking of Hannah Montana...

  47. niall1Dawesome
    • 3 years ago
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    hey can you check my answer to a question like this

  48. tafkas77
    • 3 years ago
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    yes I sure can! :)

  49. niall1Dawesome
    • 3 years ago
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    Find the volume for a sphere with a radius of 7 cm. Round to the nearest whole number. 307 cm2 1,436 cm2 1,020 cm2 615 cm2 im pretty sure its b but im going to redo the math

  50. niall1Dawesome
    • 3 years ago
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    hehe hannah montana lol

  51. niall1Dawesome
    • 3 years ago
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    yea i think it is b

  52. tafkas77
    • 3 years ago
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    You are absolutely correct. :)

  53. niall1Dawesome
    • 3 years ago
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    yay lol thx for helping me

  54. tafkas77
    • 3 years ago
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    You're welcome! :D

  55. niall1Dawesome
    • 3 years ago
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    :) everybody makes mistakes everybody has those days 1 2 3 4 lol i had too

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