1. The polulation of a city in 1991 was 350,986.
The population of the same city in 1996 was 523,026.
Assuming that the change in the number of people is constant over five-yer periods,
find a formula for the population of the city five-year periods after 1991
and predict the population of the city in 2016.
I hope you aren't asking, "What the formula?"
. . You can baby-talk your way through it.
In the five years from 1991 to 1996, the population grew:
Assuming that this rate of change of the population is constant,
. . the population will increase by 172,039 people every five years.
Therefore, in five-year periods after 1991, the population will be:
In 2016 (25 years later, or 5 five-year periods later), the population will be:
2. Use the binomial theorem to expand and simplify:
What part of "binomial theorem" don't you understand?
. . . . . .