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madisonmaruhnich94

  • 3 years ago

Find the surface area of the sphere to the nearest square unit. hold on, i have to draw it

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  1. madisonmaruhnich94
    • 3 years ago
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    |dw:1347568958290:dw|

  2. lgbasallote
    • 3 years ago
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    \[\huge SA = 4\pi r^2\] will that help?

  3. Doman
    • 3 years ago
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    just make sure ur using the radius not the diameter

  4. madisonmaruhnich94
    • 3 years ago
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    no it doesn't help/: A. 13 in.2 B. 50 in.2 C. 6 in.2 D. 3 in.2

  5. madisonmaruhnich94
    • 3 years ago
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    how do i find the answer

  6. lgbasallote
    • 3 years ago
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    what is your radius in this problem? do you know?

  7. madisonmaruhnich94
    • 3 years ago
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    2?

  8. lgbasallote
    • 3 years ago
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    no. that is the diameter. to get the radius, divide that by 2

  9. madisonmaruhnich94
    • 3 years ago
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    so 1?

  10. lgbasallote
    • 3 years ago
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    right. so substitute that to the equation i gave you

  11. madisonmaruhnich94
    • 3 years ago
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    i feel like an idiot, idk what to do

  12. lgbasallote
    • 3 years ago
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    r = 1 right? because it's the radius`

  13. madisonmaruhnich94
    • 3 years ago
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    yes

  14. madisonmaruhnich94
    • 3 years ago
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    would it be 3 in^2

  15. lgbasallote
    • 3 years ago
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    so replace r with 1 in the equation i wrote...what do you get?

  16. madisonmaruhnich94
    • 3 years ago
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    13 in^2

  17. madisonmaruhnich94
    • 3 years ago
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    ?

  18. lgbasallote
    • 3 years ago
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    will you elaborate how you got that?

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