SOLUTION: The amount of medicine in​ micrograms, A, in a​ person's bloodstream t minutes after a certain quantity of it has been inhaled can be approximated by the equation Upper A= -38t

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Question 1142704: The amount of medicine in​ micrograms, A, in a​ person's bloodstream t minutes after a certain quantity of it has been inhaled can be approximated by the equation Upper A= -38tsquared +152t. How long after inhalation will there be about 114 micrograms of medicine in the​ bloodstream?
Answer by ikleyn(52776)   (Show Source): You can put this solution on YOUR website!
.

 = 114.


 = 0.


Simplify


 = 0.


Factor left side


(t-3)*(t-1) = 0.


There are two solutions:  t= 1 minute  and  t= 3 minutes.



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