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teller

  • one year ago

Can someone make sure I did this right? A certain forest covers an area of 4300km^2. Suppose that each year this area decreases by 7.75%. What will the area be after 15 years?Use the calculator provided and round your answer to the nearest square kilometer. p=4300km^2 r=0.075 t=15 F=430KM^2(1-0.0775)^15 = 128.22245212km2

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  1. triciaal
    • one year ago
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    typo 430 s/b 4300 I think right formula

  2. teller
    • one year ago
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    they gave us the formula of f=p(1+r)^t or f=p(1-r)^t

  3. teller
    • one year ago
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    from what I know I plugged it in right.

  4. triciaal
    • one year ago
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    I did not verify the calculation

  5. phi
    • one year ago
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    tricaal is saying use 4300km^2. You used 430

  6. teller
    • one year ago
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    Oh sorry

  7. teller
    • one year ago
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    1282.22452118km2 ?

  8. phi
    • one year ago
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    round your answer to the nearest square kilometer.

  9. teller
    • one year ago
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    so would it be 1283?

  10. triciaal
    • one year ago
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    no to round when less than 1/2 way to what you need you drop

  11. teller
    • one year ago
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    Huh?

  12. phi
    • one year ago
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    is 1282.2 closer to 1282 or 1283 ?

  13. teller
    • one year ago
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    1282

  14. triciaal
    • one year ago
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    here you have 1282.2 and you need whole number 1282 then 1283

  15. teller
    • one year ago
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    so 1283?

  16. phi
    • one year ago
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    the rule is if you have 1282.5 (5 or bigger in the 10ths place) round up otherwise, just drop the decimal yes 1282 is the rounded answer.

  17. teller
    • one year ago
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    alright thank you

  18. triciaal
    • one year ago
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    |dw:1441571549092:dw|

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