Problem 5. At a time t hours after taking a tablet, the rate at which a drug is being eliminated is r'(t) = 120(e-0.25t - e-0.3t) mg/hr. -10 100 1000 (a) Use the FToC to evaluate r' (t) dt, r'(t) dt, and r' (t) dt. o o o OO (b) Make a conjecture on the exact value of r' (t) dt, then verify using Wolfram 0 Alpha. (c) Interpret the value of r'(t) dt in the context of the