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anonymous

  • one year ago

Tina has a cubic container she uses to store all of her pencils. The cubic container has a side length of 8cm. She would like to paint the entire outside of the container a new, shiny blue color. Blue paint comes in cans that contains 10 ounces of paint. Each can of paint costs $4.00. If every ounce of paint covers 2 square cm of the container, how much will Tina have to spend in total to paint the entire outside of the container? PLZZ HELP !!

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  1. welshfella
    • one year ago
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    first you have to find the area of outside of the cube . That is the area of each side * 6 as there are 6 sides to a cube. can you do that/

  2. anonymous
    • one year ago
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    Is it 36 ? @welshfella

  3. welshfella
    • one year ago
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    No each side( or face) is a square with side length 8 so the area of one square is 8 * 8 = ? square cms?

  4. anonymous
    • one year ago
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    64 cm

  5. welshfella
    • one year ago
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    64 square cms - remember its an area and there are 6 of these so total area = 6 * 64 = ? sq cms

  6. anonymous
    • one year ago
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    384cm²

  7. welshfella
    • one year ago
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    right now to find the cost we have to find how much paint we need to paint the whole cube

  8. anonymous
    • one year ago
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    Kk

  9. welshfella
    • one year ago
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    2 sq cms af area requires 1 ounce of paint so one can (10 oz) will paint 10*2 = 20 sq cms so divide 384 by use your calculator what do you get?

  10. anonymous
    • one year ago
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    I got 18

  11. welshfella
    • one year ago
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    * divide 384 by 20

  12. welshfella
    • one year ago
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    no its more than that

  13. anonymous
    • one year ago
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    Yeah your right its 19.2

  14. welshfella
    • one year ago
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    so thats 19.2 cans and cost will be 19.2 * 4 = $76.80

  15. anonymous
    • one year ago
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    In part of the question its says the store will not allow her to purchase a decimal of a can

  16. welshfella
    • one year ago
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    right - I just thought of that So she'd have to buy 20 cans which is $80.

  17. anonymous
    • one year ago
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    Yeah So $80 is my final answer ?

  18. welshfella
    • one year ago
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    yes

  19. anonymous
    • one year ago
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    Alrighty thank you so much @welshfella :) I really appreciate your help :)

  20. welshfella
    • one year ago
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    yw

  21. anonymous
    • one year ago
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    Alrighty thank you so much @welshfella :) I really appreciate your help :)

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