Crunktastic

Hey everyone! I need some help with this problem. I want to know how to work it out, not just the answer please! Any help would be very much appreciated! A 10 year old child is to receive Zosyn 750 mg IVPB q12h. The drug book states: dilute 10-20 mg/ml and administer over 30 minutes. The pharmacy has sent up Zosyn 800 mg in 15 ml. How should the nurse dilute and administer this medication? A. Add medication to a 25 ml bag of fluid and administer at 80 ml/hr with a VTBI of 40. B. Add medication to a 50 ml bag of fluid and administer at 100 ml/hr with a VTBI of 50. C. Add medication to a 100 ml bag of fluid and administer at 230 ml/hr with a VTBI of 115.