Question

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?

f(x) = 120(0.9)x
f(x) = 10(120)x
f(x) = 120(1.1)x
f(x) = 10(1.1)x

Answer 1

Hi @oscar5652551 , Do you know how to deal with percents and such? Such as when to apply them to certain amounts, especially over the course of year(s) or any length of time?

Answer 2

Also, are the 'x' components of your function being multiplied by the entire function, or, is it an exponent?

Answer 3

nope haha

Answer 4

exponent

Answer 5

Alright, goody good. I can help you. I will not give you the direct answer, but it's pretty simple and I am sure you will get it :-)

Answer 6

\[A=P(1+r)^{t}\]

Answer 7

A= new amount ; P= Starting amount ; r= rate ; t = time

Answer 8

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?
t = x
r = .10 (10%)
P= $120, simply 120.
A= TBD.

Answer 9

Plug these into the function I listed above to tell me what you get.

Answer 10

a=120(1+.10)^t

Answer 11

Excellent! Now, add what is inside your parenthesis.

Answer 12

1.1

Answer 13

Bravo. So, what does that make your entire equation?

Answer 14

a=120(1.1)^t

Answer 15

\[A=120(1.1)^{t}\]

Answer 16

Well done. :-)

Answer 17

thx so much :)

Answer 18

You're welcome! If you need more help, mention me. I am always up to helping.

Answer 19

ok i will thx