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Hayleymeyer

  • one year ago

http://media.education2020.com/evresources/878-12-03-00-00-sur_files/i0120000.jpg What is the surface area of the figure above? Note that the figure is made up of congruent cubes. a. 224 cm878-12-03-00-00-sur_files/i0120001.jpg c. 268 cm878-12-03-00-00-sur_files/i0120002.jpg b. 424 cm878-12-03-00-00-sur_files/i0120003.jpg d. 448 cm878-12-03-00-00-sur_files/i0120004.jpg

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  1. Hayleymeyer
    • one year ago
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    |dw:1433946254697:dw|

  2. Hayleymeyer
    • one year ago
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    sorry, my drawing isn't good!

  3. anonymous
    • one year ago
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    I finished my summer school :D

  4. Hayleymeyer
    • one year ago
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    @laurenbaybiee

  5. Hayleymeyer
    • one year ago
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    >:(

  6. anonymous
    • one year ago
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    I'm on my phone right now

  7. Hayleymeyer
    • one year ago
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    No one will help me lol

  8. Hayleymeyer
    • one year ago
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    @bry856

  9. Hayleymeyer
    • one year ago
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    @raiders88

  10. Hayleymeyer
    • one year ago
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    @rational

  11. Hayleymeyer
    • one year ago
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    @triciaal please help!

  12. anonymous
    • one year ago
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    lol, looks like you are having a hard time.

  13. Hayleymeyer
    • one year ago
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    I am! please help?

  14. anonymous
    • one year ago
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    look at the answer choices.

  15. Hayleymeyer
    • one year ago
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    ok.

  16. anonymous
    • one year ago
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    there is nothing there, there are no real answer choices. so i cant give u an accurate answer.

  17. Hayleymeyer
    • one year ago
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    A=224cm2 b=424mm2 c=268mm2 d=448mm2

  18. Hayleymeyer
    • one year ago
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    @geerky42 :D?

  19. geerky42
    • one year ago
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    Can't tell for sure. We don't know the size of single cube.

  20. Hayleymeyer
    • one year ago
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    it says there each 4?

  21. geerky42
    • one year ago
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    OK. You know formula for surface area of rectangle prism? \(SA = 2lw+2wh+2lh\) Can you tell me what is length? Width? and height?

  22. Hayleymeyer
    • one year ago
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    L=4 W=1 H=2

  23. geerky42
    • one year ago
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    Yeah and each cube is 4 unit^3 So you have L = 4*4 W = 1*4 H = 2*4 Right?

  24. Hayleymeyer
    • one year ago
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    yes

  25. geerky42
    • one year ago
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    Ok so L = 16 W = 4 H = 8 Now plug in and solve: \[SA = 2LW+2WH+2LH\]

  26. Hayleymeyer
    • one year ago
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    576 :)

  27. geerky42
    • one year ago
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    \[SA = 2(16)(4) + 2(4)(8) + 2(16)(8)\]

  28. geerky42
    • one year ago
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    I didn't get 576.

  29. Hayleymeyer
    • one year ago
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    448*

  30. geerky42
    • one year ago
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    OK there you go

  31. Hayleymeyer
    • one year ago
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    thank you for your time! I appreciate it!

  32. geerky42
    • one year ago
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    No problem

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