TP 1.43

(a)  1.00 day = (24 hours)(60 min/hour) = 1440 min

       1.60 mg/min = (1.60 mg/min) (1440 min/1.00 day) =  2304 mg/day = 2.304 g/day = 2.304 x 10^-3 kg/day

(b)  (0.0055 kg)/(2.304 x 10^-3 kg/day) =  2.39 days