Melisande collected 14 bottles on Saturday and 9 bottles on Sunday for recycling. On Monday, she took all the bottles to the recycling center, where they paid her a certain amount, b, for each bottle. However, she had to pay the recycling center a one-time service fee of $0.25. If she left there with $3.20 for the bottles, what is the value of b?
Melisande brought 14 + 9 = 23 bottles. The $3.20 she took home was after paying the $0.25 fee, so the bottles earned $3.20 + $0.25 = $3.45. Divide $3.45 by 23 bottles to get $0.15 per bottle, so the answer is B, $0.15.
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