Austin D.

asked • 02/17/17

Exponential rate of growth/decay?

A study is done on the population of a certain fish species in a lake. Suppose that the population size P(t) after t years is given by the following exponential function. P(t)= 280(0.81)^t. What percent does this change each year, and is it growth or decay?

Edit: So I've figured out was decay because its less than 1, but i'm still not sure how to do the % without being given "t". And 280 is the initial population size correct?

1 Expert Answer

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Mark M. answered • 02/17/17

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The percent change (decline) is 81% (the same as the rate in the formula).
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Kaay D.

Identify Initial & rate in Exponential. A study is done on the number of bacteria cells in a petri dish. Suppose that the population size P(t) after t hours is given by the following exponential function. P(t)=1700(1.06)^t ?
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02/08/21

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