Function:
f(t) = 300e−⁰.⁶ᵗ

b) Suppose a person is given an injection of 300 milligrams of penicillin at time t = 0t=0, and let f(t)f(t) be the amount in milligrams of penicillin present in the person's bloodstream tt hours after the injection.

i) How much amount of penicillin will remain at time t = 5t=5 hours?
ii) What is the biological half-life of the penicillin in this case?