Write two functions that describes the decrease of the population after t years.
1. In one study, a population of 784 orangutans is expected to decrease at a rate of 25 orangutans per year. Then after t years the number of orngutans will be
[tex]y=784-25t.[/tex]
2. In a second study, the population of a group of 817 orangutans is expected to decrease at a rate of 36 per year. Then after t years the number of orngutans will be
[tex]y=817-36t.[/tex]
3. Equate right sides of the equations:
[tex]784-25t=817-36t,\\ \\36t-25t=817-784,\\ \\11t=33,\\ \\t=3\ years.[/tex]
Answer: after 3 years
