Posted by **Hannah** on Sunday, January 30, 2011 at 10:03pm.

During the month of February, a flu epidemic hit the University. The number of people sick at

time t (measured in days) is given by the function P(t). The rate at which the epidemic is

spreading on February 3 is 110 people per day. How is the information best represented mathematically?

my answer is P(3)=110. Is this correct or would it be P'(3)=110?

- Math(Please check) -
**MathMate**, Sunday, January 30, 2011 at 11:27pm
If time t is measured in days * from the beginning of the month*, P(3)=110 is correct. Since the datum of t is not mentioned, you will have to specify this in your answer.

P'(3) is usually used to mean the *rate* of change (increase) of the number of infected per day, i.e. how many *more* per day.

- Math(Please check) -
**Hannah**, Tuesday, February 1, 2011 at 6:32pm
So if though it says that the rate at which the epidemic is spreading is 110 per day that is not rate of change correct?

- Math(Please check) -
**lucy**, Monday, February 7, 2011 at 2:18am
Perform the indicated operation

-42+6-(-7)-14 is that correct

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