Test: Precalculus

To solve this question you will need a calculator or other graphing tool capable of evaluating logarithms. 

1.

Suppose a colony of bacteria is decaying at a constant rate of 2% per minute. How many minutes will it take for the colony's population to decrease by half? Round your answer to the nearest whole minute.

20 minutes

35 minutes

-35 minutes

34 minutes

25 minutes

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