a client who had mitral valve replacement surgery receives a prescription for dextrose 5% in water (d5w) 250 ml with dobutamine 0.5 grams for iv infusion at a rate of 5 mcg/kg/minute. the client weighs 75 kg. the nurse should program the infusion pump to deliver how many ml/hr? (enter numeric value only. if rounding is required, round to the nearest tenth.)