2. ) The quantity Q, in milli grams, of medication in a patient is modelled by the formula Q = 238 (0.8) 4 where t is in the number of hours since the inital dose. (a) What was the inital dose of the medication? (b) By what percentage is Q decreasing every 4 hours? (C) By what percentage is Q decreasing every 2 hours? (d) Calculate from t = 2 to t=2+ . What are the units of this number? What does this number tell you? (e) Without further calculation', is the number from the previous part a good estimate of Q' (2)? (f) Determine Q' (2) to 3 sf by recomputing for shrinking values of h until the rate of change is not At changing to 3 sf. (g) The level of medication is considered to be ineffective when there is 10% of the initial medication. At what time does this occur?