Can someone please explain it to me ASAP???!!! This is exponential model

A certain drug is eliminated from the bloodstream with a half-life of 34 hours. Suppose that a patient receives an initial dose of 80 mg of the drug at midnight. a. How much of the drug is in the patient's blood at noon later that day? b. When will the drug concentration reach 30% of its initial level? a. The reference point is midnight. If t is measured in hours, what is the exponential decay function? y(t) = (Type an expression. Do not round until the final answer. Then round coefficients to six decimal places as needed.) Ask My Instructor Pri Clear All Check