= Quiz: Chapter 4 Quiz The concentration, C, of phenylbutazone, in micrograms per milliliter (ug/mL), in the plasma of a calf injected with this anti-inflammatory agent is given approximately by C(t) = 42.28 e - 0.01048t where t is the number of hours after the injection and 0 Sts 120. a ) Given that the model is accurate for Osts 120, what is the initial dosage? b) What is the average amount of phenylbutazone in the calf's body for the time between 10 and 120 hours? ..... a) The initial dosage is jug/mL. (Type an integer or a decimal.) b) The average amount of phenylbutazone in the calf's body for the time between 10 and 120 hours is ug/mL. (Round the final answer to two decimal places as needed. Round all intermediate values to six decimal places as needed.)