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. (1 point)
To find the approximate total weight in pounds of all the babies born in the U.S. in a year, we can multiply the average weight of a newborn by the total number of babies born.
Average weight of a newborn: 7.5 pounds
Total number of babies born: 4.1 * 10^6
Total weight = average weight x total number of babies
Total weight = 7.5 pounds * 4.1 * 10^6 babies = 30.5 * 10^6 pounds
Therefore, the approximate total weight in pounds of all the babies born in the U.S. in a year is 30.5 * 10^6 pounds.
To find the approximate total weight of all the 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.
Average weight of a newborn = 7.5 pounds
Number of babies born in the U.S. = 4.1 * 10^6
So, the total weight is: 7.5 pounds * 4.1 * 10^6 babies
To multiply these values with the same base (10), we add their exponents:
7.5 * 4.1 * 10^6 pounds
Multiplying the numbers:
= 30.75 * 10^6 pounds
Therefore, the approximate total weight of all the babies born in the U.S. in a year is 30.75 * 10^6 pounds, expressed in scientific notation to the exact decimal place.
To find the total weight of all the babies born in the U.S. in a year, we multiply the average weight of a newborn by the number of babies born in a year.
Average weight of a newborn = 7.5 pounds
Number of babies born in the U.S. in a year = 4.1 * 10^6
Therefore, the total weight in pounds can be calculated as:
Total weight = Average weight of a newborn * Number of babies born in a year
Total weight = 7.5 pounds * 4.1 * 10^6
To multiply these numbers in scientific notation, we multiply their coefficients and add their exponents:
Total weight = 7.5 * 4.1 * 10^6 pounds
Multiplying the coefficients gives:
Total weight = 30.75 * 10^6 pounds
In scientific notation, we express the coefficient as a number between 1 and 10, so we divide 30.75 by 10, moving the decimal point one place to the left. This gives:
Total weight = 3.075 * 10^7 pounds
Therefore, the approximate total weight in pounds of all the babies born in the U.S. in a year is 3.075 * 10^7.