A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

on your birthday you receive a pda for $300. the value of the pda decreases by 20% each year. Whatt will its value be 4 years from now?

  • This Question is Closed
  1. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    This can function like a simple interest problem because there's a principal ($300), a rate (20% decrease or -0.2 as a decimal each year), and a time (4 years). I = Principal x rate x time = (300)(-0.2)(4) = -240 In 4 years, the PDA loses $240 worth of value. So it has a $60 value now (300 - 240). NOW, that's assuming that the percent decrease is based on the $300 every year. If the percent decrease is based on the value each year, then it's different.

  2. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    cool thanks:)

  3. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    wait im guessing the percent decreases each year based on the value cause it says "decreases by 20% each year"

  4. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yeah, see that becomes a question of whether you lose the same amount of money each year or different. I did it where it was the same each year. I'll do one for different: Do the simple interest function for the 1 year. I = 300 (-.2)(1) = -60 In the first year, the pda loses 60 of value, so its at 240 now. That becomes your new principal. Do it for another year. I = 240 (-.2)(1) = -48 In the second year, the pda loses 48 of value, so its at 192 now. That becomes your new principal. Do it for another year. I = 192 (-.2)(1) = -38.40 In the third year, the pda loses 38.40 of value, so its at 153.60 now. That becomes your new principal. Do it for the fourth year. This is the last one. I = 153.60(-.2)(1) = 30.72 In the fourth year, the pda loses 30.72 of value, so its at $122.88 after four years.

  5. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah i got $122.88 but idk which answer is correct

  6. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Well, I'd imagine that the second one would be the way to go because values of things of one year are not the same as they are for other years. Personally, I think the question is not worded well enough to where neither answer can be considered incorrect. I'd talk to your teacher and see what he/she wants.

  7. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah I hate it when questions are worded badly it just confuses people who are already having trouble with math

  8. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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
  • 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.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.