The World Cup is an international soccer tournament. There were about 15,470,000 viewers in the United States that watched it on television.

Which shows the number of viewers rounded to the nearest ten million?

20,000,000

10,000,000

16,000,000

15,000,000

which one?

the ten million place will be two to the left of your first comma shown.

15,470,000

Look at the number just to the right. If it is larger than 4, we need to round up. It is, so we need to round the 1 to a 2 and the rest of the numbers become zeroes.

20,000,000 is the correct answer.