To determine how long it will take Oliver to complete the scarf, we need to divide the total number of rows (76) by the number of rows he knits each week (8).
The appropriate division sentence that reflects this would be:
76 ÷ 8 = 9 R4
This indicates that Oliver will complete 9 full weeks of knitting and will have 4 rows left over after that.
So, the correct response is: 76 ÷ 8 = 9 R4.