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.
7.5 pounds x 4.1*10^6 babies = 30,750,000 pounds
Therefore, the approximate total weight of all the babies born in the U.S. in a year is 3.075*10^7 pounds.