If the unemployment rate changed from 7.3% to 7.5%, how many additional workers would be unemployed in a work force of 90,000,000 people.

To calculate how many additional workers would be unemployed with a change in the unemployment rate, we need to first determine the number of unemployed workers at each rate.

At an unemployment rate of 7.3% with a workforce of 90,000,000 people, the number of unemployed workers would be:
90,000,000 * 0.073 = 6,570,000

At an unemployment rate of 7.5% with a workforce of 90,000,000 people, the number of unemployed workers would be:
90,000,000 * 0.075 = 6,750,000

To find the additional workers unemployed, we subtract the initial number of unemployed workers from the new number of unemployed workers:
6,750,000 - 6,570,000 = 180,000

Therefore, there would be an additional 180,000 workers unemployed with the change in the unemployment rate from 7.3% to 7.5% in a workforce of 90,000,000 people.