I'm not sure if this is calculus, but it is like a review in my calculus class.(adsbygoogle = window.adsbygoogle || []).push({});

Suppose that in any given year, the population of a certain endangered species is reduced by 25%. If the population is now 7500, in how many years will the population be 4000?

I've known how to do this before. I just forgot how to set it up. I'm pretty sure it's with exponents though. Please help.

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# Exponential word problem (i think)

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