Question 1176283
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Hi
Question States:
 C(25 therms) = $0.6686(25) = 16.72 
 C(45 therms) = 16.72 +  $0.85870(20) = $16.72 + $17.17 = $33.89

  for x ≥ 25
 C(x) = $0.6686(25) +  $0.85870(x - 25)) 

Wish You the Best in your Studies.
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