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Exact value or rounded one?

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frog1944:
Hi,

For topics such as growth and decay, when you find the "k" value and determine it to be k = 0.358 (as an example), and it then asks you to make a calculation using it e.g. P = 2 + 5e^kt, calculate find t when P = 8. Do you use the "proper" k or the k=0.358?

Thanks

jakesilove:

--- Quote from: frog1944 on June 20, 2017, 08:40:18 pm ---Hi,

For topics such as growth and decay, when you find the "k" value and determine it to be k = 0.358 (as an example), and it then asks you to make a calculation using it e.g. P = 2 + 5e^kt, calculate find t when P = 8. Do you use the "proper" k or the k=0.358?

Thanks

--- End quote ---

Definitely use the 'proper' value of k: either write it down to like a million decimal places, or just save it on your calculator!

frog1944:
Ok, thanks  :)

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