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anonymous

  • one year ago

* I will fan & medal! xoxo. * :D The staff at the community center make a rectangular ice skating rink every year. They use 140 meters of boarding to enclose it. So the area of the rink depends upon the width undefined chooses. This rule describes how the area depends on the width, w: w(70 ??? w) or 70w ??? w^2 Width | Area 10 | 600 15 | 825 20 | 1000 25 | ? The table shows some of the values for this function. Help complete the able. If the width is 25 metes, what will the area be? <3

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  1. anonymous
    • one year ago
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    *table

  2. SolomonZelman
    • one year ago
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    I am sturggling to understand the rule they are going by...

  3. anonymous
    • one year ago
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    @SolomonZelman

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  4. SolomonZelman
    • one year ago
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    Well, if you know that the width is 25 meters, then use: A=l•w You know that P=2(l+w) So you can use that to find the length. 140=2(l+25) solve for length

  5. SolomonZelman
    • one year ago
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    So find l, and then the Area

  6. anonymous
    • one year ago
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    l = 45

  7. SolomonZelman
    • one year ago
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    Yes, correct

  8. SolomonZelman
    • one year ago
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    And then: A=w•l A=25•45 A=?

  9. anonymous
    • one year ago
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    1,125?

  10. SolomonZelman
    • one year ago
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    I don't have a calc. so lets do that.... 25•45= 25•(25+20)= 25•25+25•20= 625+500= 1125. Yes:)

  11. anonymous
    • one year ago
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    Yay! thank you :) <3

  12. SolomonZelman
    • one year ago
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    I like practicing every technique that I can encounter while doing a question, this is why I have done what I did just now....

  13. SolomonZelman
    • one year ago
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    By the way, in Russia for example as long as other Ueropean countries, when you use a comma you indicate a decimal so I try to use space (source: from Engineering).

  14. SolomonZelman
    • one year ago
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    e.g \(1{\tiny~~}125\)

  15. SolomonZelman
    • one year ago
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    in any case, i know you meant a thousand, tho'

  16. anonymous
    • one year ago
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    Oh I see! Thank you for informing me! ^_^

  17. SolomonZelman
    • one year ago
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    Don't worry about it tho now:) You are welcome, and good luck!

  18. triciaal
    • one year ago
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    agree with the above just wanted to add the function A = (70 - w)w

  19. SolomonZelman
    • one year ago
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    Yes, that is true:)

  20. SolomonZelman
    • one year ago
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    By the way good choice of meters, as they are the "SI Units"... don't want to overwhelm on the same question tho'..... cu

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