The average newborn weighs 7.5 pounds. About 4.1×106 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.(1 point)
pounds
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 (7.5 pounds) by the number of babies born (4.1 × 10^6).
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.
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 = 4.1×10^6
Total weight = Average weight of a newborn * Number of babies born
Total weight = 7.5 pounds * 4.1×10^6
To multiply these numbers in scientific notation, we can multiply the two non-exponent parts (7.5 * 4.1) and add the exponents.
Total weight = 30.75 × 10^6 pounds
The approximate total weight of all the babies born in the U.S. in a year, expressed in scientific notation to the exact decimal place, is 30.75 × 10^6 pounds.
To calculate the total weight of all babies born in the U.S. in a year, we need to multiply the average weight of a newborn by the number of babies born.
1. Calculate the approximate total weight of all babies born in the U.S.:
Average weight of a newborn = 7.5 pounds
Number of babies born in the U.S. = 4.1x10^6
Total weight = Average weight of a newborn x Number of babies born
Total weight = 7.5 pounds x 4.1x10^6
2. Multiply the numbers:
Total weight = 30.75x10^6 pounds
3. Express the answer in scientific notation:
Since 30.75 is not in scientific notation, we can rewrite it as 3.075x10^7.
Therefore, the approximate total weight in pounds of all the babies born in the U.S. in a year is 3.075x10^7 pounds.