Which of the contexts below could not be modeled by an exponential function?AnswerMultiple Choice AnswersA town's population shrinks at a rate of 8.1% every year.A certain population of 41 aggressive zombies doubles every week.Snow was melting at a rate of 2.5 inches per hour.A radioactive compound decays at a rate of 29% per hour.
Question
Which of the contexts below could not be modeled by an exponential function?AnswerMultiple Choice AnswersA town's population shrinks at a rate of 8.1% every year.A certain population of 41 aggressive zombies doubles every week.Snow was melting at a rate of 2.5 inches per hour.A radioactive compound decays at a rate of 29% per hour.
Solution
The context that could not be modeled by an exponential function is "Snow was melting at a rate of 2.5 inches per hour." This is because it represents a linear decrease, not an exponential one. In an exponential function, the rate of change is proportional to the current value, which is not the case here.
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