anonymous
  • anonymous
A certain forest covers an area of 4200km2. Suppose that each year this area decreases by 5.5%. What will the area be after 12 years?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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campbell_st
  • campbell_st
are you working on sequences and series...?
anonymous
  • anonymous
idk @campbell_st
campbell_st
  • campbell_st
ok... makes it hard to explain, if you don't know. do you know how to use the compound interest formula..?

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anonymous
  • anonymous
yes but i need it to decrease and idk how to do that one @campbell_st
Mertsj
  • Mertsj
https://answers.yahoo.com/question/index?qid=20110221061524AAmXzyY
campbell_st
  • campbell_st
ok... so the compound interest formula can be converted to a depreciation formula by changing the sign inside the brackets from + to -
campbell_st
  • campbell_st
the formula I know is \[A = P(1 + \frac{r}{100})^n\] you can use \[A = P(1 - \frac{r}{100})^n\]
campbell_st
  • campbell_st
r = 5.5 P = 4200 and n = 12 hope it helps
anonymous
  • anonymous
thank you i will try it @campbell_st
anonymous
  • anonymous
i cant get it right @campbell_st
campbell_st
  • campbell_st
why, what do you get as an answer..?

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