The graph shows the number of people in the United States ages 65 and over for the year 2000 and projections beyond. Use $10^6$ for one million and the figures shown to solve the following problems. (Note: Express all answers in scientific notation.)

a) How many people 65 and over will there be in 2010?

Answer: people

b) How many more people 65 and over will there be in 2010 than in 2000?

Answer: people