SOLUTION: A biologist estimates there are 500 animals of a certain species in a particular region. He expects the function p(t)=500(0.9)^t/20 to model the future population of the species, w

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Question 1181881: A biologist estimates there are 500 animals of a certain species in a particular region. He expects the function p(t)=500(0.9)^t/20 to model the future population of the species, where p(t) is the population t years after the initial count. The domain of the model function is
Answer by math_tutor2020(3817) About Me  (Show Source):
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Domain: Real numbers t such that t+%3E=+0

This is because negative time values do not make any sense. So we make t nonnegative.

The domain in interval notation is [0, infinity)
We can think of it like 0 <= t < infinity
The use of the square bracket says to include the endpoint 0.