Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Selena2345 Group Title

A Goblin Miner earns 1 cent the first day, 2 cents the second day 4 cents the third day, 8 cents the fourth day and so on doubling the amount each day. How much will the miner earn in 7 days ? 2 Weeks? 1 Month ( Make An Estimate Before Solving) Show/ Explain All Work

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. satellite73 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    7 days is easy 1+2+4+8+16+32+64

    • 2 years ago
  2. satellite73 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    you might notice that this is 127, one less than 2 times 64

    • 2 years ago
  3. satellite73 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    you have \(1, 2, 2^2, 2^3, 2^4, ...\)

    • 2 years ago
  4. Selena2345 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Are your answering the question right

    • 2 years ago
  5. satellite73 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    in 7 days you will have earned \(2^7-1=\$1.27\)

    • 2 years ago
  6. Selena2345 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Are your answering the question right

    • 2 years ago
  7. satellite73 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    in two weeks you will have \(2^{4}-1\) pennies, a calculator gives \(\$163.83\)

    • 2 years ago
  8. CliffSedge Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I want that job if I get to work the whole month!

    • 2 years ago
  9. satellite73 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    me too in one month of 31 days you will have made \(2^{31}-1\) pennies, more money than i will earn in several life times

    • 2 years ago
  10. Selena2345 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    can u help cliffSedge

    • 2 years ago
  11. Selena2345 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yes cliffsedge thank you

    • 2 years ago
  12. CliffSedge Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    If you have a calculator, you can try entering '1' then hitting x2 a bunch of times (counting how many times you do so.)

    • 2 years ago
  13. CliffSedge Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Of course, that will only get you the per day earnings. You'll have to add up all the previous days' to get the total.

    • 2 years ago
  14. CliffSedge Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    But satellite's formula is a lot quicker. ;-)

    • 2 years ago
  15. Selena2345 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    thank you agent47

    • 2 years ago
  16. Agent47 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Let x be the amt u earn per day... Then, in 1 day: 1cent = 2^0 cents 2 days: 2 cents = 2^1 cents 3 days: 4 cents = 2^2 cents 4 days: 8 cents = 2^3 cents... So, in n days, you get 2^(n-1) cents

    • 2 years ago
  17. Agent47 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    I think, satellite's made a mistake.. but that's IMPOSSIBRU!

    • 2 years ago
  18. Agent47 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Thus, in 7 days: 2^(7-1)=2^6=64 cents

    • 2 years ago
  19. Agent47 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    woah waitttt

    • 2 years ago
  20. Agent47 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    That is the amount he earned on the 1st, 2nd, 3rd, 4th, etc days, and on the 7th day he earns 64 cents

    • 2 years ago
  21. Selena2345 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    is the answer to the question finish

    • 2 years ago
  22. Agent47 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Not yet... the formula is: |dw:1347412596200:dw|

    • 2 years ago
  23. satellite73 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    actually i gave the total earned on day \(n\) not the amount earned on day \(n\)

    • 2 years ago
  24. Agent47 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ya you're right, i just realized that

    • 2 years ago
  25. Selena2345 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    is the answer to the question finish

    • 2 years ago
  26. satellite73 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    on day \(n\) you earn \(2^{n-1}\) pennies, for a total of \(2^n-1\) pennies

    • 2 years ago
  27. Agent47 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok i see, then that's the final answer... satellite why are u so smart?

    • 2 years ago
  28. Selena2345 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    who's correct satellite or agent47

    • 2 years ago
  29. Agent47 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    satellite, obv, who's a level 100 here?

    • 2 years ago
  30. Agent47 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    but i did realize my mistake, before satellite pointed it out :P

    • 2 years ago
  31. Selena2345 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    who's correct satellite or agent47

    • 2 years ago
    • Attachments:

See more questions >>>

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.