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19 May, 20:52

A store had 235 MP3 players in the month of January. Every month, 30% of the MP3 players were sold and 50 new MP3 players were stocked in the store.

Which recursive function best represents the number of MP3 players in the store f (n) after n months?

a f (n) = 0.7 * f (n - 1) + 50, f (0) = 235, n > 0

b f (n) = 237 - 0.7 * f (n - 1) + 50, f (0) = 235, n > 0

c f (n) = 0.3 * f (n - 1) + 50, f (0) = 235, n > 0

d f (n) = 237 + 0.7 * f (n - 1) + 50, f (0) = 235, n > 0

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Answers (1)
  1. 19 May, 20:59
    0
    The answer is A cause 30% is 0.7 and f (n-1) equals the amount being sold the + 50 is for every 50 new one and the the 235 is for what they started with
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