anonymous
  • anonymous
can someone tell me if im doing this right?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
\[A(t)=31,959(1+\frac{ 4.39 }{ 12 })^{12t}\] \[31,595=(1.37)^{12t}\] \[31,959=(43.72)^{t}\]
anonymous
  • anonymous
now im stuck
taramgrant0543664
  • taramgrant0543664
If you put a ln in front of both sides then the t will come down. So you would have ln(31959)=tln(43.72) an then can divide each side by ln(43.72)

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anonymous
  • anonymous
what the ln for?
taramgrant0543664
  • taramgrant0543664
It's the natural logarithm
anonymous
  • anonymous
so what would it be after you divide by ln(43.72)? sorry i dont have a scientific or graphing calc with me
taramgrant0543664
  • taramgrant0543664
After the division you would find that t= 2.74556, I don't know how many significant digits you would want
anonymous
  • anonymous
what does it mean when it says "you want figure out how many months it will be until your principal is paid down to $10,000.00."
anonymous
  • anonymous
does that mean you put 10,000 in the P spot or subtract your cars price until you get 10,000?
taramgrant0543664
  • taramgrant0543664
Just to clarify the initial price of the car is 31959? If so then you would put the 10,000 where the A(t) is and solve for time
anonymous
  • anonymous
\[10,000=31,595(1+\frac{ 4.39 }{ 12 })^{12t}\] \[.317=(1.37)^{12t}\] \[.317=(43.72)^{t}\]
anonymous
  • anonymous
and then divide by ln43.72?
anonymous
  • anonymous
@taramgrant0543664
taramgrant0543664
  • taramgrant0543664
That's what I would have done.
anonymous
  • anonymous
can you tell me what that is after you divide?
taramgrant0543664
  • taramgrant0543664
I'm sorry something is wrong as it comes out as a negative number so something is off and I am trying figure out what happened! Sorry!!
anonymous
  • anonymous
can you also tell me what 31,595 divided by ln62.59 is please?
anonymous
  • anonymous
and it said its supposed to be a negative so you didnt mess up!
taramgrant0543664
  • taramgrant0543664
I should also note that when you ln the one side you have to ln the other as well
taramgrant0543664
  • taramgrant0543664
31595 divided by ln62.59 is 7637.9 ln31595 divided by ln62.59 is 2.50
taramgrant0543664
  • taramgrant0543664
I always just assume that when I see a negative value I am wrong as I am a chemistry major and when things are negative it normally means I did something really wrong! ln0.317 divided by ln43.72 equals -0.304
anonymous
  • anonymous
i understand! thank you so much!
taramgrant0543664
  • taramgrant0543664
Your welcome! Sorry for the small confusion but hopefully it's good now lol!
anonymous
  • anonymous
it is! lol

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