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bigoldnastyfish Group Title

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
  • one year ago

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  1. bigoldnastyfish Group Title
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    Which product recorded a greater percentage change in price over the previous year? Justify your answer. (5 points)

    • one year ago
  2. dmezzullo Group Title
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    Is this an exam?

    • one year ago
  3. bigoldnastyfish Group Title
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    no its the study guide

    • one year ago
  4. bigoldnastyfish Group Title
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    could you help me?

    • one year ago
  5. kewlgeek555 Group Title
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    Do you still need help?

    • one year ago
  6. bigoldnastyfish Group Title
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    yes

    • one year ago
  7. kewlgeek555 Group Title
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    Okay, 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.

    • one year ago
  8. bigoldnastyfish Group Title
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    that is totally fine im just studying had a question on this problem

    • one year ago
  9. kewlgeek555 Group Title
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    I am back. Sorry for being three minutes late.

    • one year ago
  10. bigoldnastyfish Group Title
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    its ok haha

    • one year ago
  11. kewlgeek555 Group Title
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    Okay, I shall help you now. Let me start:

    • one year ago
  12. kewlgeek555 Group Title
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    When it doesn't say that "Kewlgeek555 is typing a reply..." it is because I am thinking or doing work. ;]

    • one year ago
  13. kewlgeek555 Group Title
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    Part 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???

    • one year ago
  14. bigoldnastyfish Group Title
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    Which product recorded a greater percentage change in price over the previous year? Justify your answer. (5 points)

    • one year ago
  15. kewlgeek555 Group Title
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    Okay, this is for the table in Part B, correct?

    • one year ago
  16. bigoldnastyfish Group Title
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    correct

    • one year ago
  17. kewlgeek555 Group Title
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    And 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.

    • one year ago
  18. bigoldnastyfish Group Title
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    t (number of years) 1 2 3 4 f(t) (price in dollars) 4300 1849 795.07 341.88

    • one year ago
  19. kewlgeek555 Group Title
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    I 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|

    • one year ago
  20. bigoldnastyfish Group Title
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    yup

    • one year ago
  21. kewlgeek555 Group Title
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    Okay. Then, I think it is year 1 - 2.

    • one year ago
  22. bigoldnastyfish Group Title
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    can you prove it?

    • one year ago
  23. kewlgeek555 Group Title
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    Well, 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.

    • one year ago
  24. kewlgeek555 Group Title
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    NO, 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.

    • one year ago
  25. bigoldnastyfish Group Title
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    OOOOOOO I see

    • one year ago
  26. bigoldnastyfish Group Title
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    do you think you could help me with 1 more question?

    • one year ago
  27. bigoldnastyfish Group Title
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    Belinda 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

    • one year ago
  28. bigoldnastyfish Group Title
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    Part 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)

    • one year ago
  29. kewlgeek555 Group Title
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    Where is Part A? Please tag me as several people are requesting help right now. D:

    • one year ago
  30. bigoldnastyfish Group Title
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    All i really need to know is the percentage of what option 1 is growing at

    • one year ago
  31. bigoldnastyfish Group Title
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    Part 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)

    • one year ago
  32. bigoldnastyfish Group Title
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    i already did that part

    • one year ago
  33. kewlgeek555 Group Title
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    Oh, oh, okay. Well, um. Hm...do you have the function equation? Or the value at year 0?

    • one year ago
  34. bigoldnastyfish Group Title
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    there is no year 0

    • one year ago
  35. kewlgeek555 Group Title
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    Okay, so did you make a function?

    • one year ago
  36. bigoldnastyfish Group Title
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    I just need to know at what percentage option 1 changes at

    • one year ago
  37. bigoldnastyfish Group Title
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    Thats all I need to do

    • one year ago
  38. bigoldnastyfish Group Title
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    I can do the rest after that

    • one year ago
  39. kewlgeek555 Group Title
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    This 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.

    • one year ago
  40. kewlgeek555 Group Title
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    I hope I'm not confusing.

    • one year ago
  41. bigoldnastyfish Group Title
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    what is the rate of chagne of option 1 as a percentage

    • one year ago
  42. kewlgeek555 Group Title
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    Okay, I don't know now. My mind is like something else today. Let me call @jigglypuff314 @texaschic101 @agent0smith @terenzreignz for you.

    • one year ago
  43. jigglypuff314 Group Title
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    I'm not too good at this either ;) http://www.ehow.com/how_8117999_exponential-equation-two-points.html I got that the equation for option 1 is d = 1000(1.3^n) if that helps...

    • one year ago
  44. bigoldnastyfish Group Title
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    I figured it out thank you guys :D

    • one year ago
  45. sosakiing Group Title
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    wht did you get cause i got the same problemand im so lost

    • 3 months ago
  46. Secret-Ninja Group Title
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    Lies. This IS an exam. *smh*

    • one month ago
  47. bloofoffiction Group Title
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    The only way you would know that is by looking up the question during the test as well @Secret-Ninja

    • one month ago
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