Question

Dr. Jane is studying the growing population of a species of jellyfish in a body of water. Each year, she records the population of jellyfish. The first year, she recorded a population of 16 jellyfish. Every following year, the population increased by four times the previous year’s population. At this rate, what will be the jellyfish population in the 7th year of her study?

Answer 1

We can use the equation [ f(x) = 16*4^(x-1) ] where x equals the year of study.

f(7) = 16*4(7-1)

f(7) = 16*4^6

f(7) = 16*4096

f(7) = 65,536

There is no option that resembles the correct answer.

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