Rate of Change of Medicine Amount in Blood after Injection | M(t) = -1/3t^2 + t

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In summary, we have an equation M(t) = -1/3t^2 + t that represents the amount of medicine in milligrams in 1 mL of a patient's blood t hours after an injection is given. To find the rate of change of M, we differentiate the equation and substitute t = 2 into M'(t). This gives us the rate of change of M 2 hours after the injection.
  • #1
TayTayDatDude
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Homework Statement


A medicine is administered to a patient. The amount, M, of the medicine in milligrams, in 1 mL of the patient's blood t hours after the injection is given by
M(t) = -1/3t^2 + t where 0<=t<=3

Find the rate of change of teh amount, M, 2 hours after the injection.


Homework Equations





The Attempt at a Solution



No idea.
 
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  • #2
Differentiate the equation and substitute t = 2 into M'(t).
 
  • #3
snipez90 said:
Differentiate the equation and substitute t = 2 into M'(t).

Elaborate please.
 
  • #4
TayTayDatDude said:
Elaborate please.

You have M(t), what does M'(t) = ? Now plug in t into M'(t) i.e. evaluate M'(2)
 

1. What does the equation M(t) = -1/3t^2 + t represent?

The equation represents the rate at which the amount of medicine in the blood changes over time after an injection. The variable t represents time, and M(t) represents the amount of medicine in the blood at a specific time t.

2. How is the rate of change of medicine amount calculated from this equation?

The rate of change of medicine amount is calculated by taking the derivative of the equation M(t) with respect to time. This will give the instantaneous rate of change at a specific time point.

3. What unit is used to measure the rate of change of medicine amount?

The unit for the rate of change of medicine amount is typically expressed as units of medicine per unit of time, such as milligrams per minute or micrograms per second.

4. How does the coefficient of t^2 in the equation affect the rate of change of medicine amount?

The coefficient of t^2, which is -1/3 in this equation, represents the acceleration of the rate of change. This means that the rate at which the medicine amount changes increases or decreases at a faster rate as time goes on, depending on the sign of the coefficient.

5. Can this equation be used to predict the exact amount of medicine in the blood at a specific time?

No, this equation can only give an estimate of the amount of medicine in the blood at a specific time. Other factors such as absorption, distribution, and metabolism of the medicine can also affect the final amount in the blood.

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