Alexandra was modeling the rate of decay of a certain medication in the blood
stream based on the amount of time that has passed since the patient took the
medication. The function used to model the situation is represented by the
function
f(x) = 500(0.25)
What does the value of 0.25 in the function rule represent in this situation?

A)The amount, in grams, of the medication initially taken by the patient.
B)The amount of medicine, in grams, left in the patient's blood stream.
C)The rate of decay of the medication amount in the patient's blood stream over time.
D)The amount of time, in hours, that pass between measurements of the medication in
the patient's blood stream.