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.

Answer 1

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.