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24 January, 16:55

Sarah started with $150 of credit card debt. Each month, she paid $50 of her bill, but by the next month the interest made her remaining bill double. What is the recursive formula for Sarah's credit card bill?

A. Dn+1=50Dn-2

B. Dn=1=2Dn

C. Dn+1=2Dn-50

D. Dn+1=2Dn+50

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Answers (2)
  1. 24 January, 19:04
    0
    D. Is the correct answer
  2. 24 January, 20:04
    0
    the formula is option d
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