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Help with finding differential equation constants

I tried working it out using simultaneous eq but im getting k as a weird -73.57 and i know i prob messed my e log rules somewhere.
(edited 7 years ago)
Screenshot_20160521-090420.jpg273.0KB
When t=1, N=1200

When t=2, N=1800

Sub those in, try solving simultaneously
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Jyashi
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I did do that but i dont know if my answer is correct. Therefore wanted some workings from the community to check against. Ill try to upload my workings for this soon.
Original post by Serine Soul
When t=1, N=1200

When t=2, N=1800

Sub those in, try solving simultaneously
Attachment not found
image.jpgHi,
I tried the question and got:
K= ln(19/8)
B= 9025
N= 4700 (to nearest 100 where t=6)
I solved the equations simultaneously.
Hope this helps
(edited 7 years ago)
image.jpg507.9KB
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Jyashi
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Wow thank you sooo much i was struggling with that for some time. I was using simultaneously as well but did not think of it this way.

Original post by Matt_Braybrook
Attachment not found
image.jpgHi,
I tried the question and got:
K= ln(19/8)
B= 9025
N= 4700 (to nearest 100 where t=6)
I solved the equations simultaneously.
Hope this helps
Original post by Jyashi
Wow thank you sooo much i was struggling with that for some time. I was using simultaneously as well but did not think of it this way.


No problem :smile:

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