A model estimates that the population of a state was 4 million in 1980 and increased by 0.041 million each year until 2007.
According to the model, what was the estimated population of this state, in millions, 10 years after 1980?
Enter a number or fraction, e.g. 5, 0.5, 1/2
Explanation
Setup: Use the initial population plus 10 years of yearly increase.
Solve: million.
Answer:
Common slips:
- Multiplying by instead of adding the yearly increase.
- Using 2007 as the number of years instead of 10.
- Reporting the increase instead of the population.