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Selena2345

  • 2 years ago

Heather wanted to measure the effects of erosion on a mound of soil in her backyard. The area she measured was 9 inches in height. During a storm it eroded 1/8 every day for 8 days. Write an expression that can be used to find the height of the mound of soil after the storm and simplify the expression.

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  1. electrokid
    • 2 years ago
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    originally: 9in every day (1/8)th gets eroded.. how much is left out? -> 7/8th end of day 1-> \(h_1=9\times{7\over8}\) end of day 2->\(h_2=h_1{7\over8}=9\times\left({7\over8}\right)^2\) and so on.. end of nth day-> \(h_n=9\times\left({7\over8}\right)^n\)

  2. electrokid
    • 2 years ago
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    so how much would be left?

  3. Selena2345
    • 2 years ago
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    63/8

  4. Selena2345
    • 2 years ago
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    IS IT RIGHT electro kid

  5. electrokid
    • 2 years ago
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    it will be \(9\times\left({7\over8}\right)^8\)

  6. Selena2345
    • 2 years ago
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    3.092480242

  7. electrokid
    • 2 years ago
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    yep

  8. electrokid
    • 2 years ago
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    how did you get 63/8?

  9. Selena2345
    • 2 years ago
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    i multipled 9*7/8

  10. electrokid
    • 2 years ago
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    that is after the first day.. look at my elaboration.. after "n" number of days... \(h_n\)

  11. electrokid
    • 2 years ago
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    the question asks you to obtain that expression!

  12. Selena2345
    • 2 years ago
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    CAN YOU HELP ME WITH 9 WORD PROBLEMS PLEASE ?

  13. electrokid
    • 2 years ago
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    say whaaaat!! i needed to chill, so i did this one.. there are lots o' nice people over here... post em up, I am sure somebody would answer

  14. electrokid
    • 2 years ago
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    :)

  15. Selena2345
    • 2 years ago
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    NOBODY ANSWER PLEASE

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