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.
To calculate the total weight of all the babies born in the U.S. in a year, we need to multiply the average weight (7.5 pounds) by the number of babies born (4.1 × 10⁶).
7.5 pounds/baby * 4.1 × 10⁶ babies = 30.75 × 10⁶ pounds
To express this in scientific notation, we need to move the decimal point to the right so that there is only one digit to the left of the decimal point:
30.75 × 10⁶ pounds = 3.075 × 10⁷ pounds
Therefore, the approximate total weight of all the babies born in the U.S. in a year is 3.075 × 10⁷ pounds.
To find the 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 in the U.S.
7.5 pounds * 4.1 × 10⁶ babies = 7.5 * 4.1 × 10⁶ pounds.
Multiplying these numbers, we get:
7.5 * 4.1 × 10⁶ = 30.75 × 10⁶ pounds.
In scientific notation, 30.75 can be expressed as 3.075 × 10¹⁷, so the weight of all the babies born in the U.S. in a year is approximately 3.075 × 10¹⁷ pounds.
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 number of newborns born in a year.
Given that the average weight of a newborn is 7.5 pounds and the number of newborns born in the U.S. in a year is 4.1 × 10⁶, we can calculate the total weight as follows:
Total weight = Average weight of a newborn × Number of newborns born in the U.S. in a year
Total weight = 7.5 pounds × 4.1 × 10⁶ newborns
Multiplying these values, we have:
Total weight = 7.5 × 4.1 × 10⁶ pounds
To simplify the computation and express the result in scientific notation, we multiply the two decimal values:
Total weight = 30.75 × 10⁶ pounds
This can also be written in scientific notation as 3.075 × 10⁷ pounds.
So, the approximate total weight in pounds of all the babies born in the U.S. in a year is 3.075 × 10⁷ pounds.