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anonymous

  • one year ago

QUICK QUESTION! The number of subscribers y to a magazine after t years is shown by the equation below: y = 95(0.75)t Which conclusion is correct about the number of subscribers to the magazine? (A) It increased by 25% every year. (B) It decreased by 25% every year. (C) It increased by 75% every year. (D) It decreased by 75% every year.

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  1. anonymous
    • one year ago
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    @jim_thompson5910 I need you again! Is this D?

  2. jim_thompson5910
    • one year ago
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    why do you think D

  3. anonymous
    • one year ago
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    Because, when t = 1, y = 71.25. When t = 0, y = 95. It went from 95 to 71.25 by multiplying 0.75 by 95, equaling 71.25

  4. jim_thompson5910
    • one year ago
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    going from 95 to 71.25, what is the amount (not percentage) in decrease?

  5. anonymous
    • one year ago
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    It decreased by 23.75 subscribers

  6. jim_thompson5910
    • one year ago
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    divide that by the original amount 95

  7. anonymous
    • one year ago
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    0.25

  8. jim_thompson5910
    • one year ago
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    so 25% of 95 is 23.75 saying "we lost 23.75 subscribers" is the same as saying "we lost 25% of our subscribers" (going from 95 to 23.75)

  9. anonymous
    • one year ago
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    Oh I think I understand. You are doing average rate of change, right?

  10. jim_thompson5910
    • one year ago
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    no, but it's somewhat related in a way

  11. anonymous
    • one year ago
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    Oh, well, okay -_- Thanks so much!

  12. jim_thompson5910
    • one year ago
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    sure thing

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