High School

Ms. Pickles, your 173 lb. patient, has been prescribed a laxative. You know that too much laxative can be deadly (your patient could dehydrate) and too little might not be enough to be effective. The pharmacist has indicated that 2.1 mL is the appropriate amount. You decide to check the calculation. You know that the laxative packaging indicates there are 80 mg of laxative per mL and that she needs 3.0 mg per kg of.

Answer :

The appropriate amount of laxative for Ms. Pickles is approximately 6.24 mL.


To calculate the appropriate amount of laxative for Ms. Pickles, we need to consider her weight and the recommended dosage. She weighs 173 lb., and the recommended dosage is 3.0 mg of laxative per kg of body weight.

First, convert her weight to kg (173 lb = 78.47 kg). Then, multiply her weight by the recommended dosage (78.47 kg * 3.0 mg/kg = 236.41 mg).

Given that the laxative concentration is 80 mg per mL, we can convert the dosage from milligrams to milliliters by dividing the dosage by the concentration (236.41 mg / 80 mg/mL ≈ 2.96 mL). Rounding off to an appropriate significant figure, the correct amount of laxative is approximately 2.96 mL.


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