Situation:
A 45 gram sample of a substance that's
used to preserve fruit and vegetables has
a k-value of 0.1109.
N-Noe-kt
No - initial mass (at time t - 0)
N = mass at time t
k - a positive constant that depends on
the substance itself and on the units
used to measure time
t-time, in days
Find the substance's half-life, in days.
Round your answer to the nearest tenth.
Enter the correct answer.
+00
DONE

Question

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Respuesta :

ap8997154 ap8997154 · Answer 1 · 2022-06-25T08:55:22+02:00

A function assigns the values. The half life of the substance is 6.25 days.

A function assigns the value of each element of one set to the other specific element of another set.

Given the function for the substance as [tex]N= N_o e^{-kt}[/tex], therefore, the half life of the substance can be written as,

[tex]N= N_o e^{-kt}\\\\\dfrac{N}{N_o}= e^{-kt}[/tex]

Since we need to find the half life, therefore, the ratio of the initial mass and the mass after half-life will be 1/2.

[tex]\dfrac12= e^{-kt}\\\\\ln (0.5) = -kt[/tex]

Given the value of k is 0.1109, therefore,

[tex]\ln (0.5) = -kt\\\\\ln (0.5) = -(0.1109)t\\\\t = 6.25[/tex]

Hence, the half life of the substance is 6.25 days.

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