Crayfish are sometimes used as live bait by fisherman. After a day of fishing, a fisherman let go 5 unused crayfishes in a lake. A year later, the population of crayfish has grown to 15. Assuming that the population is growing exponentially, how many crayfishes can one expect after 4 years? Round your answer to the closest full number

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Communities and Ecosystems

Ecology contains two words: Eikos means dwelling, and logy means to study, so the combined meaning is studying habitat or living.