62. A newborn weighs 3,459 grams. There are 453.59 grams per pound. What is the infant's weight in pounds and ounces?
Answer: A
The infant's weight is 7lbs 10oz.
To convert the newborn's weight from grams to pounds and ounces, we first convert grams to pounds by dividing the weight in grams by the conversion factor of 453.59 grams per pound. This calculation yields approximately 7.64 pounds, which translates to 7 pounds and approximately 10 ounces when considering the fractional part.
A) 7lbs 10oz.
This option is correct because the conversion from 3,459 grams to pounds results in approximately 7.64 pounds. The whole number part is 7 pounds, and the decimal part (0.64 pounds) is converted to ounces (0.64 × 16 ounces = 10.24 ounces), rounding down to 10 ounces gives a total of 7 pounds and 10 ounces.
B) 10lbs 7oz.
This option is incorrect as it significantly overestimates the weight of the newborn. The conversion of 3,459 grams to pounds does not approach 10 pounds, making this choice inaccurate.
C) 13lbs 3oz.
This option is also incorrect. Similar to option B, it greatly exceeds the calculated weight of the newborn. The conversion clearly indicates a weight below 10 pounds, thus making this option invalid.
D) 3lbs 13oz.
This option is incorrect as well. The weight of 3,459 grams converts to more than 3 pounds; thus, this option underestimates the infant's weight, further confirming it is not a viable answer.
Conclusion
Option A is definitively correct as it accurately represents the conversion of 3,459 grams into 7 pounds and 10 ounces. The other options fail because they either overestimate or underestimate the weight, not aligning with the proper conversion calculations. Therefore, A is the only option that correctly reflects the infant's weight in pounds and ounces.