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SOLUTION

The answer is 6.6 drops per minute. To determine this, use the drop factor provided (0.33 mL/drop) and the flow rate (200 mL/hr).

6.6 drops per minute = (200 mL/hr) / (0.33 mL/drop)
6.6 drops per minute = 602.02 drops/hr
6.6 drops per minute = 602.02 drops/60 minutes
6.6 drops per minute = 10.03 drops/minute