The price of bronze has increased by 10% per year from 2000. In the year 2000, Harry bought a bronze medal for $120. Which of the following functions f(x) can be used to represent the price of the medal x years after 2000?

Question

anonymous · Answer

(A) f(x) = 120(0.9)^x 
(B) f(x) = 10(120)^x 
(C) f(x) = 120(1.1)^x 
(D) f(x) = 10(1.1)^x

anonymous · Answer

@Abhisar @cwrw238 @SolomonZelman @TuringTest @e.mccormick I need help! Please someone help me!!

anonymous · Answer

@mathmath333 
@Michele_Laino @iGreen

anonymous · Answer

$$A=P(1+r)^{t}$$ This is your equation for exponential growth. where 
A= new amount, P= starting amount, r= rate, and t=time

anonymous · Answer

knowing this equation, plug in the values corresponding to the problem and this should give you your answer.

anonymous · Answer

Okay, so that would make f(x) = A
120 = P

anonymous · Answer

correct

anonymous · Answer

when you add 1 to the 0.1 that would make it equal to 1.1

anonymous · Answer

exactly

anonymous · Answer

and t = time, meaning that x = t

anonymous · Answer

you've got it

anonymous · Answer

So then the answer is C.

anonymous · Answer

That's it.

anonymous · Answer

Thank YOU SO MUCH! :)

anonymous · Answer

No problem.