Question 9, 3.11.62 HW Score: 72.22%, 6.5 of 9 points * Points: 0 of 1 Save The concentration C in milligrams per milliliter (mg/ml) of a certain drug in a person's blood-stream t hours after a pill is swallowed is modeled by C(t) = 8 + e - 0.021 Estimate the change 1+ 15 in concentration when t changes from 40 to 50 minutes. . . . . . The change in concentration is about mg/ml. (Type an integer or decimal rounded to the nearest thousandth as needed.)