Logarithms expontential growth decay help
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Someone pls help me with this question I can’t figure it out because we haven’t being given either k or a
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#2
(Original post by Halpme9)
Someone pls help me with this question I can’t figure it out because we haven’t being given either k or a
Someone pls help me with this question I can’t figure it out because we haven’t being given either k or a
What does

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(Original post by ghostwalker)
You're told the value of the car when it's new, i.e. when t=0.
What does
equal?
You're told the value of the car when it's new, i.e. when t=0.
What does

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#4
(Original post by Halpme9)
ah ok its 1 so 12499 = A1 meaning A = 12499 can i apply this to my equation 7000 = AK^36 meaning 7000= 12499K^36
ah ok its 1 so 12499 = A1 meaning A = 12499 can i apply this to my equation 7000 = AK^36 meaning 7000= 12499K^36
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(Original post by ghostwalker)
Yes.
Yes.
7000= 12499k^36
log7000 = log12499k^36
log7000 = 36log12499k
log7000 / 36log12499 = k
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#6
(Original post by Halpme9)
ok thanks after going through with (ii) i didnt get the right answer given what have i done wrong?
7000= 12499k^36
log7000 = log12499k^36
log7000 = 36log12499k
log7000 / 36log12499 = k
ok thanks after going through with (ii) i didnt get the right answer given what have i done wrong?
7000= 12499k^36
log7000 = log12499k^36
log7000 = 36log12499k
log7000 / 36log12499 = k

Corrected.
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k = log 7000 - log 12499 / 36log
i dont know how to divide by 36log?
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#8
(Original post by Halpme9)
ok i did actually try this but i got lost when i my answer ended up being
k = log 7000 - log 12499 / 36log
i dont know how to divide by 36log?
ok i did actually try this but i got lost when i my answer ended up being
k = log 7000 - log 12499 / 36log
i dont know how to divide by 36log?
So,

Rearrange and taking logs:

And

Work it out and then take the antilog.
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