Medicine Concentration The concentration C of amedication in the bloodstream t hours after beingadministered is modeled by the functionC1t2 = - 0.002x4 + 0.039t3 - 0.285t2 + 0.766t + 0.085 (a) After how many hours will the concentration behighest?(b) A woman nursing a child must wait until the concentrationis below 0.5 before she can feed him. After taking themedication, how long must she wait before feeding herchild?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter8: Linear Functions
Section8.7: Function Notation
Problem 44E
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Medicine Concentration The concentration C of a
medication in the bloodstream t hours after being
administered is modeled by the function
C1t2 = - 0.002x4 + 0.039t
3 - 0.285t
2 + 0.766t + 0.085

(a) After how many hours will the concentration be
highest?
(b) A woman nursing a child must wait until the concentration
is below 0.5 before she can feed him. After taking the
medication, how long must she wait before feeding her
child?

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