During your journey, you develop an abscessed tooth and have to visit the dentist. You are prescribed an antibiotic with a dosage of 7.5 mg/kg every six hours. If you weigh 128 pounds and the antibiotic comes in 250 mg tablets, how many tablets should you take each day? Use dimensional analysis and show your work. Round to the nearest whole number. (The earlier answer on this site of "4" is incorrect. The correct answer is 7, but I don't know how to let you know.)