The average newborn weighs 7.5 pounds about 4.1*10 to the power of 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 us in an year write the answer in scientific notation

To find the approximate total weight of all the babies born in the U.S. in a year, you can multiply the average weight of a newborn by the number of babies born.

The average weight of a newborn is 7.5 pounds, and the number of babies born each year is approximately \( 4.1 \times 10^6 \).

Here's the calculation:

\[ \text{Total Weight} = \text{Average Weight} \times \text{Number of Babies} \]

\[ \text{Total Weight} = 7.5 , \text{pounds} \times 4.1 \times 10^6 , \text{babies} \]

Calculating this:

\[ \text{Total Weight} = 7.5 \times 4.1 \times 10^6 \]

Calculating \( 7.5 \times 4.1 \):

\[ 7.5 \times 4.1 = 30.75 \]

Now, putting this result in scientific notation:

\[ 30.75 = 3.075 \times 10^1 \]

So,

\[ \text{Total Weight} = 3.075 \times 10^1 \times 10^6 = 3.075 \times 10^{7} \]

Therefore, the approximate total weight of all the babies born in the U.S. in a year is:

\[ \approx 3.075 \times 10^{7} , \text{pounds} \]