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anonymous

  • one year ago

HELP!!! The surface area of two similar rectangular prisms are 361m2 and 441m2. What is the scale factor of the larger prism to the smaller prism? A.) 361/441 B.) 19/21 C.) 21/19 D.) 19/11

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  1. anonymous
    • one year ago
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    @ganeshie8 please help

  2. anonymous
    • one year ago
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    @Nnesha

  3. anonymous
    • one year ago
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    @nincompoop

  4. ganeshie8
    • one year ago
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    Hint : If areas of similar figures are in ratio \(\dfrac{a}{b}\), then the lengths(scale factors) will be in ratio \(\dfrac{\sqrt{a}}{\sqrt{b}}\)

  5. anonymous
    • one year ago
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    so i just take each answer choice and do that to them??

  6. anonymous
    • one year ago
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    i'm still not understanding

  7. ganeshie8
    • one year ago
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    Yes, first setup the ratio of areas

  8. anonymous
    • one year ago
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    is it 19/21

  9. ganeshie8
    • one year ago
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    careful, they want larger prism on top

  10. ganeshie8
    • one year ago
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    ratio of areas = \(\dfrac{441}{361}\)

  11. anonymous
    • one year ago
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    so its C?

  12. ganeshie8
    • one year ago
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    so, ratio of scalefactors = \(\dfrac{\sqrt{441}}{\sqrt{361}}=?\)

  13. anonymous
    • one year ago
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    21/19

  14. ganeshie8
    • one year ago
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    Yep!

  15. anonymous
    • one year ago
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    i have another question if thats ok

  16. ganeshie8
    • one year ago
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    sure ask

  17. anonymous
    • one year ago
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    The two cones are similar. Find the surface area of the larger cone. Round your answer to the nearest hundredth. A. 810.28 B. 847.80 C. 868.30 D. 886.25

  18. anonymous
    • one year ago
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  19. anonymous
    • one year ago
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    @ganeshie8

  20. anonymous
    • one year ago
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    S=π×11.12+π×11.1×13.8 is the formula, solve that and u will get the answer

  21. anonymous
    • one year ago
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    I got 516..../

  22. anonymous
    • one year ago
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    that's not right

  23. anonymous
    • one year ago
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    hmm let me solve and see what i get

  24. anonymous
    • one year ago
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    ok

  25. anonymous
    • one year ago
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    i am sorry the same question is on open study and I checked the formula I am so sorry I was not able to help

  26. anonymous
    • one year ago
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    i feel bad :(

  27. anonymous
    • one year ago
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    its ok. @ganeshie8 can you help

  28. anonymous
    • one year ago
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    thnx

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