Solution :
Let y = amount of caffeine at a given time in body.
n = number of hours
So 

ln Y = -0.01 n + C
At n = 0, Y = 130 mg
ln 130 = -0.01 x 0 + C
C = ln 130


When Y = 65



n = 69.315 hours
At n = 24 hours

Y = 102.26 mg
Answer:
I don't understand what this is
Answer:
D hope this helps :)
Step-by-step explanation: