Solve the Problem $$\mathrm { D } = 8 \mathrm { e } ^ { - 0.04 h }$$

Multiple Choice

Solve the problem.
-The formula D $$\mathrm { D } = 8 \mathrm { e } ^ { - 0.04 h }$$ can be used to find the number of milligrams D of a certain drug in a patient's bloodstream h hours after the drug has been given. When the number of milligrams reaches 4, the drug is to be
Given again. What is the time between injections?

A) 34.66 hrs
B) 17.33 hrs
C) 51.99 hrs
D) 20.47 hrs