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anonymous

  • 4 years ago

Match the information about interest earned with the principal amount invested. Remember the equation for calculating simple interest is I equals p times r times t . seventy-two dollars over 3 years at an interest rate of three percent sixty-six dollars over 2 years at an interest rate of three percent seventy-two dollars over 2 years at an interest rate of four percent seventy-two dollars over 3 years at an interest rate of two percent A. p equals nine hundred dollars B. p equals one thousand two hundred dollars C. p equals one thousand one hundred d

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  1. Mertsj
    • 4 years ago
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    Did you try this?

  2. Mertsj
    • 4 years ago
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    the first one would be interest earned is 72, principal we have to find, rate is .03 and time is 3 years.

  3. Mertsj
    • 4 years ago
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    \[72=P(.03)(3)\]

  4. Mertsj
    • 4 years ago
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    P=800

  5. Mertsj
    • 4 years ago
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    Why do you only have 3 answers for 4 problems?

  6. anonymous
    • 4 years ago
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    I put the last one but it wont show it was ( D. p equals eight hundred dollars )

  7. Mertsj
    • 4 years ago
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    Can you try the next one and tell me what you get and I will check it.

  8. anonymous
    • 4 years ago
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    66(.3)(2) i did this but i got 39.6 :\

  9. Mertsj
    • 4 years ago
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    \[66=P(.03)(2)\]\[\frac{66}{(.03)(2)}=P\] \[1100=P\]

  10. anonymous
    • 4 years ago
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    am I adding the (.03) (2) together and then dividing it by 66?

  11. Mertsj
    • 4 years ago
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    No. Let's take some simpler numbers and see if you can understand. What if I have 12 = 2x Could you solve that? And how would you do it?

  12. anonymous
    • 4 years ago
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    6 12 ÷ 2 = 6?

  13. Mertsj
    • 4 years ago
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    Yes. look at what I am going to draw.

  14. Mertsj
    • 4 years ago
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    |dw:1328200164853:dw|

  15. Mertsj
    • 4 years ago
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    So these equations that you have to solve are exactly like that.

  16. Mertsj
    • 4 years ago
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    do you have a calculator?

  17. anonymous
    • 4 years ago
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    Yes

  18. Mertsj
    • 4 years ago
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    Write this down on a piece of paper; 66=P(.03)(2)

  19. anonymous
    • 4 years ago
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    k

  20. Mertsj
    • 4 years ago
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    Now multiply .03 times 2

  21. Mertsj
    • 4 years ago
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    What did you get?

  22. anonymous
    • 4 years ago
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    .06

  23. Mertsj
    • 4 years ago
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    So now write this: 66=P(.06)

  24. anonymous
    • 4 years ago
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    k

  25. Mertsj
    • 4 years ago
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    Now divide both sides of the equation by .06 like I showed you in the drawing.

  26. anonymous
    • 4 years ago
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    p = 1100

  27. anonymous
    • 4 years ago
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    :D ahh i see

  28. Mertsj
    • 4 years ago
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    Very good. Now set up the next one and tell me how you set it up. NOT the answer, just the set-up.

  29. anonymous
    • 4 years ago
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    ok

  30. anonymous
    • 4 years ago
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    72 = P(.04)(2)

  31. Mertsj
    • 4 years ago
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    Perfect!! Now, can you solve it?

  32. anonymous
    • 4 years ago
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    yes :D!

  33. Mertsj
    • 4 years ago
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    Great. Tell me what you get.

  34. anonymous
    • 4 years ago
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    P = 800?

  35. Mertsj
    • 4 years ago
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    That's not what I got. You check your answer and I will check mine.

  36. anonymous
    • 4 years ago
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    well i got 1800 = p but I did not know what to do with the (2) in 72 = P(.04)(2)

  37. Mertsj
    • 4 years ago
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    (.04)(2) means .04 times 2 so multiply them together first.

  38. Mertsj
    • 4 years ago
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    Then you should have 72=P(.08)

  39. anonymous
    • 4 years ago
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    yes

  40. Mertsj
    • 4 years ago
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    Now divide both sides of the equation by .08

  41. Mertsj
    • 4 years ago
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    Like I showed you in the drawing.

  42. anonymous
    • 4 years ago
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    p = 900

  43. Mertsj
    • 4 years ago
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    Bingo!!! Now try the last one.

  44. Mertsj
    • 4 years ago
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    And show me your setup

  45. anonymous
    • 4 years ago
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    72 = P(.04)(2) .04 x 2 = .08 72 = P(.08) 1,900 = p that??

  46. Mertsj
    • 4 years ago
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    Well that is all perfect except when you divided both sides by .08 you must have hit a wrong button. So try the division part again.

  47. Mertsj
    • 4 years ago
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    Oh. just a minute. That is the same problem we just did.

  48. anonymous
    • 4 years ago
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    oh you want the next?

  49. Mertsj
    • 4 years ago
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    Yes. The last problem.

  50. Mertsj
    • 4 years ago
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    The final problem in the list.

  51. anonymous
    • 4 years ago
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    seventy-two dollars over 3 years at an interest rate of two percent 72 = P (.02)(3) 72 = P (.06) 1,200 = p

  52. Mertsj
    • 4 years ago
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    WOW!!! You are just too smart!

  53. anonymous
    • 4 years ago
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    :D ty for teaching me!!!

  54. Mertsj
    • 4 years ago
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    yw

  55. anonymous
    • 4 years ago
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    sorry i took so long to understand o.o

  56. Mertsj
    • 4 years ago
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    That's ok. We all have trouble with stuff. It's just not the same stuff for everyone.

  57. anonymous
    • 4 years ago
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    thanks :)

  58. Mertsj
    • 4 years ago
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    yw

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