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21 March, 22:33

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. 21 March, 22:56
    0
    D. Is the correct answer
  2. 22 March, 01:13
    0
    the formula is option d
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