We have to calculate the dosis written by the doctor.
The order said 300 mg/kg daily.
The weight is 123 lb, so we have to convert it to kilograms (1 kg = 2.2 lb):
[tex]W=123\text{ lb}\cdot\frac{1\operatorname{kg}}{2.2\text{ lb}}\approx56\operatorname{kg}[/tex]We then can calculate the dosis by multiplicating the dosis per kg times the weight:
[tex]300\frac{mg}{\operatorname{kg}}\cdot56\operatorname{kg}=16800mg\cdot\frac{1g}{1000mg}=16.8g[/tex]The antibiotic dosis is 16.8 g/daily.
