anonymous
  • anonymous
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.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@jim_thompson5910 I need you again! Is this D?
jim_thompson5910
  • jim_thompson5910
why do you think D
anonymous
  • anonymous
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

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jim_thompson5910
  • jim_thompson5910
going from 95 to 71.25, what is the amount (not percentage) in decrease?
anonymous
  • anonymous
It decreased by 23.75 subscribers
jim_thompson5910
  • jim_thompson5910
divide that by the original amount 95
anonymous
  • anonymous
0.25
jim_thompson5910
  • jim_thompson5910
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)
anonymous
  • anonymous
Oh I think I understand. You are doing average rate of change, right?
jim_thompson5910
  • jim_thompson5910
no, but it's somewhat related in a way
anonymous
  • anonymous
Oh, well, okay -_- Thanks so much!
jim_thompson5910
  • jim_thompson5910
sure thing

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