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sarah_98 Group Title

ryan puts $500 into a bank account. the bank pays 5% compound interest per year. how much is the interest after one year?

  • 2 years ago
  • 2 years ago

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  1. ParthKohli Group Title
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    Continuous compounding. \( \color{Black}{\Rightarrow 500(1 + 0.05) \large^n }\)

    • 2 years ago
  2. ParthKohli Group Title
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    \(n\textbf{ is the number of years.}\)

    • 2 years ago
  3. sarah_98 Group Title
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    ok

    • 2 years ago
  4. ParthKohli Group Title
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    \( \color{Black}{\Rightarrow 500(1.05)^1 }\) \( \color{Black}{\Rightarrow 500 \times 1.05 }\)

    • 2 years ago
  5. sarah_98 Group Title
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    $525?

    • 2 years ago
  6. sarah_98 Group Title
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    is it?

    • 2 years ago
  7. ParthKohli Group Title
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    This is compounded interest.

    • 2 years ago
  8. sarah_98 Group Title
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    im confused :s

    • 2 years ago
  9. ParthKohli Group Title
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    And yes it is $525 :)

    • 2 years ago
  10. sarah_98 Group Title
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    oh ok there's part 2

    • 2 years ago
  11. ZhangYan Group Title
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    lol sorry parth read mistake ;)

    • 2 years ago
  12. ParthKohli Group Title
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    Interest = Amount - Principal Interest = 525 - 500 Interest = 25

    • 2 years ago
  13. sarah_98 Group Title
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    work out the total amount he has in his bank account after 2 yrs

    • 2 years ago
  14. ParthKohli Group Title
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    @ZhangYan if it's one year then both simple and compound may apply :) so your answer is correct but not the method :S

    • 2 years ago
  15. sarah_98 Group Title
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    work out the total amount he has in his bank account after 2 yrs

    • 2 years ago
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