A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
Please help!
Just need help on Part B.
anonymous
 one year ago
Please help! Just need help on Part B.

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The price of products may increase due to inflation and decrease due to depreciation. Derek is studying the change in the price of two products, A and B, over time. The price f(x), in dollars, of product A after x years is represented by the function below: f(x) = 72(1.25)x Part A: Is the price of product A increasing or decreasing and by what percentage per year? Justify your answer. (5 points) Part B: The table below shows the price f(t), in dollars, of product B after t years: t (number of years) 1 2 3 4 f(t) (price in dollars) 65 84.5 109.85 142.81 Which product recorded a greater percentage change in price over the previous year? Justify your answer. (5 points)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I just need help on Part B.

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0if you try to test the terms in this table, that is: \(\large\color{black}{ \displaystyle 84.5\div 65 =?}\) \(\large\color{black}{ \displaystyle 109.85\div 84.5 =?}\) and on, then you can tell that these terms have acommon ratio of ... ?

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0they follow a pattern of multiplying times what number?

Flvs.net
 one year ago
Best ResponseYou've already chosen the best response.0Nevermind he has gotten 3000 medals he will prob. help you better.

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0i got more than 3 times as many medals, but i don't think medals decide anything.....

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0Anyway, have you found this number that I asked for?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0my internet is not working good

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0Every term is being multiplied times 1.3 and thus it is a geometric sequence with r=1.3 or an exponential function with a base 1.3 (the same exact thing).

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is that the answer for part B?

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0no, don't worry about that. r=1.3 is related to geometric sequence, and I can explain that later, and that is option....

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0but, anyhow, you multiply times 1.3 everytime. Got that?

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0(this is by product B)

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0So product B is multiplied times 1.3 and product A (based on its function \(f(x)=72(1.25)^x\)) you can tell that it is multiplied times 1.25 every time. right?

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0(PRODUCT B) ok, so multiplying times 1.3 is just same as taking 130% of the previous value. And that means that you are increasing by 30% each year. (PRODUCT A) and multiplying times 1.25, is just same as taking 125% of the previous value. That means that you are increasing by 25% each year.

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0if you need more help with this problem, then let me know.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.