The half-life of caffeine in a healthy adult is 4.8 hours. Jeremiah drinks 18 ounces of caffeinated coffee in the morning. How long will it take for only 60% of the caffeine to remain in his body? O In In 2 ( 4.8) O In In 2 (4.8) O In In 2 (18) O 1 20 5 In 2 (18) Question 10 8 pts Half-Life uses the formula N (t) = Noen2 No = Initial Amount t = time h = length of half-life. If you start with 85 milligrams of Chromium 51, used to track red blood cells, which has a half-life of 27.7 days. How long will it take for 90% of the material to decay