Question

a pediatric nurse is calculating the dosage that one of her patients needs to treat an infection. the dosing system requires the childs weight in kilograms. the child weighs 43 pounds. to convert pounds to kg, you take the childs weight in pounds and divide by 2.2. what is the childs weight in kilograms? round answer to two decimal places. do not put units in your answer. the prescription dosage is 15mg of medicine per kg of patients weight. based off of this dosage and your rounded answer from part 1, how much total medicine in mg should be prescribed for a 43 - pound child. round answer to two decimal places. do not put units in your answer. the nurse rounds the childs weight up to 20 kg. what is the difference between the dosage found from rounding the weight up to 20kg and the correct dosage found in part 2 of this question. round answer to two decimal places. do not put units in your answer. if the nurse misinterprets the formula and thinks that the dosage is 15 mg per pound, what would the nurse get as the calculated dosage for a 43 - pound child? write your answer as a whole number. do not include units.

Explanation:

Step1: Convert pounds to kilograms

$43\div2.2\approx19.55$

Step2: Calculate correct medicine dosage

$19.55\times15 = 293.25$

Step3: Calculate dosage with rounded - up weight

$20\times15=300$

Step4: Find difference in dosages

$300 - 293.25=6.75$

Step5: Calculate dosage with misinterpreted formula

$43\times15 = 645$

Answer:

19.55
293.25
6.75
645