Use the exponential decay model, A = Aoekt, to solve the following. The half-life of a certain substance is 25 years. How long will it take for a sample of this substance to decay to 76% of its original amount?
Use the exponential decay model, A = Aoekt, to solve the following. The half-life of a certain substance is 25 years. How long will it take for a sample of this substance to decay to 76% of its original amount?
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Transcribed Image Text:Use the exponential decay model, A = Anekt, to solve the following.
The half-life of a certain substance is 25 years. How long will it take for a sample of this substance to decay to 76% of its
original amount?
It will take approximately
(Round to one decimal place as needed.)
...
for the sample of the substance to decay to 76% of its original amount.

Transcribed Image Text:The half-life of a certain su
ow long It take for a sample of
75% of its original amount? Use the exponential decay model, A = Anekt, to solve.
0.75A0 = Age
Simplify the expression. Divide.both sides of the equation by A.
0.75A = A₂e-0.
A = A₂e-0.0217t
-0.0217t
ve this
-0.0217t
0.75=e=0.0217t
Take the natural logarithm on both sides.
MAY
2
0.75=e
-0.0217t
In 0.75 = In e¯ 0.0217t
In 0.75= -0.0217t
Simplify the right side using In e = x.
To solve for t, divide both sides by -0.0217. Round the answer to one decimal place.
In 0.75= -0.0217t
In 0.75
-0.0217t
-0.0217 -0.0217
13.3t
Print
Divide.
view an example
2
Divide.
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