Question

A population of 1250 cheetahs decreases by 11% per year. How many cheetahs in 4 years?

Answer 1

There are 784 number of cheetahs in 4 years.

Explanation:

Given : A population of 1250 cheetahs decreases by 11% per year.

To find : How many cheetahs in 4 years?

Solution :

The population decreased at rate is given by,

`N=N_o(1-r)^t`

Where, N is the total population

`N_o=1250` is the initial population

r=11%=0.11 is the rate

t=4 years is the time.

Substitute the values,

`N=1250(1-0.11)^4`

`N=1250(0.89)^4`

`N=1250* 0.62742241`

`N=784.2780`

Therefore, there are 784 number of cheetahs in 4 years.