Answer:11
Step-by-step explanation:
She needs 100 candles but has already 15,so she will need another 100-15 candles to get to 100.
100-15 = 85
Therefore, she needs to buy 85 candles.
However,each box has 8 candles,so she will need al least 11 boxes to get a number bigger than 85.
8*11 =88
She will also have 3 spare candles as 88- 85 =3
