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March 28, 2024, 09:03:13 pm

Author Topic: Exact value or rounded one?  (Read 1238 times)  Share 

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frog1944

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Exact value or rounded one?
« on: June 20, 2017, 08:40:18 pm »
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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

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Re: Exact value or rounded one?
« Reply #1 on: June 20, 2017, 08:43:02 pm »
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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

Definitely use the 'proper' value of k: either write it down to like a million decimal places, or just save it on your calculator!
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frog1944

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Re: Exact value or rounded one?
« Reply #2 on: June 20, 2017, 08:54:06 pm »
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Ok, thanks  :)