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Pachacha [2.7K]

3 years ago

7

Can any one help me on math? I'm in 8th grade, and I need help on slope intercept graphing. If you will please message me and I

can give you more information on it from there. Thank you,
Bella

2 answers:

Alik [6]3 years ago

8 0

I can help you as well. How would you like my help?

spayn [35]3 years ago

7 0

Hi! im in eighth grade too, and im learing the same stuff, i could probably help you!

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formula is $A=P(1-\frac{r}{n})^{nt}$

where A=final amount

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remember that $ln(x^a)=a(ln(x))$

also that $(a^b)^c=a^{bc}$

$2(5745)=5745(1+\frac{0.065}{12})^{12t}$ , solving for t

divide both sides by 5745 to simplify things a bit

$2=(1+\frac{0.065}{12})^{12t}$ I'd rather not simplify this because it give us a decimals and those aren't exact, if we combine, we get 12.065/12 for inside parenthases

$2=(\frac{12.065}{12})^{12t}$

take ln of both sides

$ln(2)=ln((\frac{12.065}{12})^{12t})$

$ln(2)=(12t)ln(\frac{12.065}{12})$

divide both sides by $12ln(\frac{12.065}{12})$

$\frac{ln(2)}{12ln(\frac{12.065}{12})}=t$

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