Answer: 194,000,000
Step-by-step explanation:
Given : According to the U.S. Census Bureau, about 63% of Americans are adults (18 and over).
We can rewrite 63% as 0.63 [ ∵ we divide 100 to convert a percent into decimal]
The estimated population of U.S in 2010= 308 million
We know that 1 million = 1,000,000
⇒The estimated population of U.S in 2010= 308,000,000
Now, the number of American adults in 2010 will be :-
[Roundedto the nearest hundred thousand]
hence, the approximate number of American adults in 2010= 194,000,000