Question

The population of an endangered species of leopards is decreasing by 22% each year. If there were originally 4,600 leopards, which exponential equation can be used to determine how many leopards are left after 12 years?

Answer 1

`A=4,600(1-0.22)^(12)`

1) Since A is the present value, and the initial number of leopards is always multiplying a decay/increasing factor in the exponential model, we can write out the following considering the given data:

2)

`A=4600(1-0.22)^(12)`

Note that since the number of leopards is decreasing then it will be lesser than 1.