The average newborn weighs 7.5 pounds. About 4.1×10^6 babies are born in the United States every year. What is the approximate total weight in pounds of all the babies born in the U.S. in a year? Write the answer in scientific notation, expressed to the exact decimal place.
To find the total weight of all the babies born in the U.S. in a year, we can multiply the average weight of a newborn by the number of babies born.
Average weight of a newborn = 7.5 pounds
Number of babies born = 4.1×10^6
Total weight = Average weight of a newborn * Number of babies born
Total weight = 7.5 pounds * 4.1×10^6 babies
Now, let's calculate the total weight in pounds:
Total weight = 7.5 * 4.1×10^6 pounds
= 30.75×10^6 pounds
= 3.075×10^7 pounds
Therefore, the approximate total weight of all the babies born in the U.S. in a year is approximately 3.075×10^7 pounds.
To find the approximate total weight of all the babies born in the U.S. in a year, we can multiply the average weight of a newborn (7.5 pounds) by the total number of babies born in the U.S. per year (4.1×10^6).
Calculating this, we have:
7.5 pounds × 4.1×10^6 babies = 30.75×10^6 pounds
To express this in scientific notation, we can write it as:
3.075×10^7 pounds
Therefore, the approximate total weight of all the babies born in the U.S. in a year is 3.075×10^7 pounds.
To find the approximate total weight of all the babies born in the U.S. in a year, we can multiply the average weight of a newborn by the number of babies born.
Average weight of a newborn = 7.5 pounds
Number of babies born in the U.S. = 4.1×10^6 babies
To calculate the total weight, we perform the following calculation:
Total weight = Average weight of a newborn × Number of babies born
Total weight = 7.5 pounds × 4.1×10^6 babies
To multiply by 4.1×10^6, we multiply the numbers and add the exponents:
Total weight = 7.5 × 4.1 × 10^6 pounds
Multiplying 7.5 by 4.1 gives us 30.75, and multiplying 10^6 by 10^0 gives us 10^6.
Total weight = 30.75 × 10^6 pounds
Finally, we can express the answer in scientific notation by moving the decimal point to the right, resulting in a factor of 10.
Total weight = 3.075 × 10^7 pounds
Therefore, the approximate total weight of all the babies born in the U.S. in a year is 3.075 × 10^7 pounds.