WILL MEDAL
What is the multiplicative rate of change for the exponential function f(x) = 2()–x?

Question

WILL MEDAL
What is the multiplicative rate of change for the exponential function f(x) = 2()–x?

jaylelile · Answer

please help!

Ginny is studying a population of frogs. She determines that the population is decreasing at an average rate of 3% per year. When she began her study, the frog population was estimated at 1,200. Which function represents the frog population after x years?

f(x) = 1,200(1.03)x
f(x) = 1,200(0.03)x
f(x) = 1,200(0.97)x
f(x) = 1,200(0.97)x

jaylelile · Answer

@jpaulkai    ?

anonymous · Answer

Well if 1.00 represents 100%, what would equal 3%? (HINT: Move the decimal around)

anonymous · Answer

Also, why are the last 2 answers the same?

jaylelile · Answer

I have no idea lol

anonymous · Answer

Okay well lets use the process of elimination. If 1.00 is 100%, then 1.03 is 103% - which is incorrect. That also means that 0.97 is 97%, which is also incorrect. Leaving us with one other option since the last two options are identical.

anonymous · Answer

THE ANSWER IS THE SECOND ONE SO... (B)