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 one year ago
The 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) = 10250(0.63)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) 4300 1849 795.07 341.88
 one year ago
The 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) = 10250(0.63)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) 4300 1849 795.07 341.88

This Question is Closed

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0Which product recorded a greater percentage change in price over the previous year? Justify your answer. (5 points)

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0no its the study guide

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0could you help me?

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7Do you still need help?

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7Okay, I am really sorry, but I have to eat. Though, I can explain this question perfectly to you. So, I'll be back in like 20 to 30 minutes  i hope thats okay.

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0that is totally fine im just studying had a question on this problem

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7I am back. Sorry for being three minutes late.

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7Okay, I shall help you now. Let me start:

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7When it doesn't say that "Kewlgeek555 is typing a reply..." it is because I am thinking or doing work. ;]

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7Part I: You know that this function is DECREASING because 0.63, the number inside of the parenthesis, is LESS THAN THE NUMBER 1. I [think I] know the way to determine by what percentage it is decreasing. [I think] My teacher taught me that I have to subtract the number, in this case 0.63, from 1. So, 1  0.63 = 0.37. So it is decreasing by 0.37. Part II: Wait, what are the directions asking you to do???

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0Which product recorded a greater percentage change in price over the previous year? Justify your answer. (5 points)

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7Okay, this is for the table in Part B, correct?

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7And is this the table of Part B: dw:1387393002341:dw Is this correct? Also, I have to go do soemthing for my job, be back in like less than ten minutes, more than five minutes.

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0t (number of years) 1 2 3 4 f(t) (price in dollars) 4300 1849 795.07 341.88

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7I am back. I am still confused. Do you have a picture or something? But, now I think I understand A LITTLE. Is this correct?: dw:1387394201440:dw

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7Okay. Then, I think it is year 1  2.

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0can you prove it?

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7Well, I subtracted years 1  2, 2  3, 3  4, and 1  2 was the greatest difference. I just didn't want to because what I said right there is a horrid "prove it" sentence. So, I can't really prove it.

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7NO, no. Actually, they are all changing by the same percentage: 43% less. And you can prove it by dividing year 2 to year 1 and dividing year 3 to year 2. Sorry for the inaccurate answer.

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0do you think you could help me with 1 more question?

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0Belinda wants to invest $1000. The table below shows the value of her investment under two different options for two different years. Number of years 1 2 3 Option 1 (amount in dollars) 1300 1690 2197 Option 2 (amount in dollars) 1300 1600 1900

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0Part B: Write one function for each option to describe the value of the investment f(n), in dollars, after n years. (4 points) Part C: Belinda wants to invest in an option that would help to increase her investment value by the greatest amount in 20 years. Will there be any significant difference in the value of Belinda's investment after 20 years if she uses option 2 over option 1? Explain your answer and show the investment value after 20 years for each option. (4 points)

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7Where is Part A? Please tag me as several people are requesting help right now. D:

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0All i really need to know is the percentage of what option 1 is growing at

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0Part A: What type of function, linear or exponential, can be used to describe the value of the investment after a fixed number of years using option 1 and option 2? Explain your answer. (2 points)

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0i already did that part

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7Oh, oh, okay. Well, um. Hm...do you have the function equation? Or the value at year 0?

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0there is no year 0

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7Okay, so did you make a function?

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0I just need to know at what percentage option 1 changes at

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0Thats all I need to do

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0I can do the rest after that

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7This also seems to be a constant rate of growth. Year 2, 1690, is year 1 times 1.3. And year 3, 2197, is year 2 times 1.3. So, the rate of growth must be 130% of year 0, or in other words f(0) * 1.3.

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7I hope I'm not confusing.

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0what is the rate of chagne of option 1 as a percentage

kewlgeek555
 one year ago
Best ResponseYou've already chosen the best response.7Okay, I don't know now. My mind is like something else today. Let me call @jigglypuff314 @texaschic101 @agent0smith @terenzreignz for you.

jigglypuff314
 one year ago
Best ResponseYou've already chosen the best response.3I'm not too good at this either ;) http://www.ehow.com/how_8117999_exponentialequationtwopoints.html I got that the equation for option 1 is d = 1000(1.3^n) if that helps...

bigoldnastyfish
 one year ago
Best ResponseYou've already chosen the best response.0I figured it out thank you guys :D

sosakiing
 4 months ago
Best ResponseYou've already chosen the best response.0wht did you get cause i got the same problemand im so lost

SecretNinja
 2 months ago
Best ResponseYou've already chosen the best response.0Lies. This IS an exam. *smh*

bloofoffiction
 2 months ago
Best ResponseYou've already chosen the best response.0The only way you would know that is by looking up the question during the test as well @SecretNinja
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