What is the rate of decay of the population of bacteria?

Question

The population of a bacteria after x numbers of hours is modeled by the expression 1000(0.75)^x . What is the rate of decay of the population of bacteria?

Answer 1

After one hour, the population will be 1000(0.75) = 750, a reduction of 25% from the original 1000.

 

After one more hour, the population will be 750(0.75), a reduction of 25% from the previous 750.

 

Do you see the pattern?

https://www.khanacademy.org/math/algebra/introduction-to-exponential-functions/exponential-decay-alg1/v/word-problem-solving-exponential-growth-and-decay