1:12 # # # & & & 5G .iIll 61% 7. Suppose that another drug is administered intravenously to an adult patient in a hospital as prescribed by a doctor. The relationship between the concentration of the drug (in mg/L) in the bloodstream and the time (in hours after administration) is modeled by the function c(t ) = - 20t 12 + 4 a) Using the function above, fill in a chart of the concentration of the drug in the bloodstream for the first 24-hour period after administration at intervals of two hours. Write the concentration accurate to two decimal places as needed. 0 6 8 10 12 14 16 18 20 22 24 c(t) b) When will the concentration of the drug fall to a level of 0.5 mg/L? c) When must the next dose of the drug be administered to the patient in order to maintain a concentration above 1 mg/L and below 8 mg/L? Explain your reasoning. d) What is a reasonable domain for this function? Justify why (and if) you would exclude any values. 3 of 3 O K