00:01
Hi, in this question, a doubling time formula can be used to calculate the population of a town after a given number of years.
00:08
Doubling time is the amount of time it takes for a given quantity to double in size or value at a constant growth rate.
00:14
In this case, the doubling time is equal to 8 years.
00:23
To find the annual growth rate, we can use the rule of 70, which says that the doubling time is approximately equal to 70 divided by the annual growth rate.
00:33
So, as a percentage, basically growth rate is a percentage only.
00:40
So, which is equal to, to find the annual growth rate, we can use the rule of, say the doubling time is equal to, so doubling time is equal to 70 by annual.
00:54
Therefore, the annual growth rate is approximately 8 .75%.
01:01
This is annual growth rate.
01:05
So, to find the population of the town after 12 years, we can use the doubling time formula...