Solve the problem. The concentration, contained by parts per million, of a out of the ordinary drug within a patient's blood x hours

after the drug is administered is given by the function

f(x) = -x^4 + 8x^3 - 27x^2 + 44x

How many hours after the drug is administered will it be eliminate from the bloodstream?


Answers:    Hi

I just used my calculator, it is 4. So, after 4 hours, the concentration is 0.

Hope this help. Check it if you want, put 4 into the equation, the answers 0

Ashley
I really do not have an answer, but i would close to to know how you soved this problem.

thanks

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