On which day was the fly population halfway from extinction

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Question Description

A city of flies has a population that doubles once every day. The flies go extinct from overpopulation on the 30th day. On which day was the fly population halfway from extinction?

Tutor Answer

ysavenasquez
School: New York University

The fly population is halfway from extinction on the 29th day. Explanation: As stated in the problem, the rate of increase in population doubles every day. The number of flies reached its peak on the 30th day before the flies go extinct, therefore dividing the population on this day by two would result in the population o...

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