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anonymous

  • one year ago

can someone tell me if im doing this right?

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  1. anonymous
    • one year ago
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    \[A(t)=31,959(1+\frac{ 4.39 }{ 12 })^{12t}\] \[31,595=(1.37)^{12t}\] \[31,959=(43.72)^{t}\]

  2. anonymous
    • one year ago
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    now im stuck

  3. taramgrant0543664
    • one year ago
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    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)

  4. anonymous
    • one year ago
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    what the ln for?

  5. taramgrant0543664
    • one year ago
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    It's the natural logarithm

  6. anonymous
    • one year ago
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    so what would it be after you divide by ln(43.72)? sorry i dont have a scientific or graphing calc with me

  7. taramgrant0543664
    • one year ago
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    After the division you would find that t= 2.74556, I don't know how many significant digits you would want

  8. anonymous
    • one year ago
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    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."

  9. anonymous
    • one year ago
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    does that mean you put 10,000 in the P spot or subtract your cars price until you get 10,000?

  10. taramgrant0543664
    • one year ago
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    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

  11. anonymous
    • one year ago
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    \[10,000=31,595(1+\frac{ 4.39 }{ 12 })^{12t}\] \[.317=(1.37)^{12t}\] \[.317=(43.72)^{t}\]

  12. anonymous
    • one year ago
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    and then divide by ln43.72?

  13. anonymous
    • one year ago
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    @taramgrant0543664

  14. taramgrant0543664
    • one year ago
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    That's what I would have done.

  15. anonymous
    • one year ago
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    can you tell me what that is after you divide?

  16. taramgrant0543664
    • one year ago
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    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!!

  17. anonymous
    • one year ago
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    can you also tell me what 31,595 divided by ln62.59 is please?

  18. anonymous
    • one year ago
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    and it said its supposed to be a negative so you didnt mess up!

  19. taramgrant0543664
    • one year ago
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    I should also note that when you ln the one side you have to ln the other as well

  20. taramgrant0543664
    • one year ago
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    31595 divided by ln62.59 is 7637.9 ln31595 divided by ln62.59 is 2.50

  21. taramgrant0543664
    • one year ago
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    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

  22. anonymous
    • one year ago
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    i understand! thank you so much!

  23. taramgrant0543664
    • one year ago
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    Your welcome! Sorry for the small confusion but hopefully it's good now lol!

  24. anonymous
    • one year ago
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    it is! lol

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