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Dima020 [189]
3 years ago
9

The half-life of caffeine in a person’s bloodstream is about 6 hours. If a person’s bloodstream contains 80 milligrams of caffei

ne, how much of that caffeine will remain after 14 hours?
Mathematics
1 answer:
Luda [366]3 years ago
5 0
To calculate the remaining caffeine, we use the radioactive decay formula which is expressed as An = Aoe^-kt where An is the amount left after t time, Ao is the initial amount and k is a constant we can calculate from the half-life information. We do as follows:
 at half-life,
ln 1/2 = -k(6)
k = 0.12/hr

An = 80e^-0.12(14)
An = 15.87 mg
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Based on the one-sample t-test that Mark is using, the two true statements are:

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<h3>What are the degrees of freedom?</h3><h3 />

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This is a low degrees of freedom and one characteristic of low degrees of freedom is that their tails are shorter and thicker when compared to standard normal distributions.

Options for this question are:

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Find out more on the degrees of freedom at brainly.com/question/17305237

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