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 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:
7.5 pounds/baby * 4.1×10^6 babies = 3.075×10^7 pounds.
So 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.
The average weight of a newborn is 7.5 pounds. Let's convert this to scientific notation by moving the decimal point one place to the left: 7.5 = 7.5 × 10^0.
The number of babies born in the U.S. every year is approximately 4.1 × 10^6.
To find the total weight, we multiply these two numbers together:
(7.5 × 10^0) × (4.1 × 10^6) = (7.5 × 4.1) × (10^0 × 10^6) = 30.75 × 10^6.
Since 30.75 is not in scientific notation, let's convert it: 30.75 = 3.075 × 10^1.
Putting it all together, the total weight in pounds of all the babies born in the U.S. in a year, in scientific notation, is approximately 3.075 × 10^1 × 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 total number of babies born.
First, let's convert the weight of a newborn from pounds to scientific notation. The average weight is given as 7.5 pounds, which can be written as 7.5 × 10^0 pounds in scientific notation.
Next, we multiply the average weight by the total number of babies born, which is 4.1 x 10^6.
(7.5 × 10^0 pounds) × (4.1 x 10^6 babies)
To multiply numbers in scientific notation, we multiply the coefficients (7.5 × 4.1) and add the exponents (0 + 6), resulting in:
(30.75) × (10^6) pounds
Finally, we express the answer in scientific notation, with a coefficient between 1 and 10, multiplied by a power of 10:
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 pounds.