Question

A nurse is converting an infant's weight from lb to kg. If the infant weighs 6 lb 2 oz, what is the infant's weight in kg?

a) 3.2 kg
b) 2.5 kg
c) 2.8 kg
d) 2.7 kg

Answer 1

To convert an infant's weight of 6 lb 2 oz to kilograms, we calculate the weight in kilograms for each unit (pounds and ounces) separately and then sum them up. After rounding to the nearest tenth, the infant's weight is 2.8 kg.

Step-by-step explanation:

To convert the infant's weight from pounds (lb) and ounces (oz) to kilograms (kg), we first need to recognize that 1 lb is equivalent to 0.45359237 kg and 1 oz is equivalent to 0.0283495231 kg. The infant weighs 6 lb 2 oz, which we will convert separately and then sum up.

First, convert pounds to kilograms:
6 lb × 0.45359237 kg/lb = 2.72155 kg

Next, convert ounces to kilograms:
2 oz × 0.0283495231 kg/oz = 0.056699 kg

Now, sum the two conversions to get the total weight in kilograms:
2.72155 kg + 0.056699 kg = 2.778249 kg

Since we're looking for an answer that matches with the options provided, we round to the nearest tenth, which gives us 2.8 kg.

Therefore, the correct answer is (c) 2.8 kg.