Answer:
6 inches
Step-by-step explanation:
The trick here is there are 12 slices.
To convince yourself of that, set up a table
Number of cuts Number of slices.
0 1 You have the whole loaf.
1 2 You cut the loaf in 1/2. There are 2 slices.
2 3
3 4
.
.
.
11 12
1 slice is 1/2" thick
12 slices are 1/2 * 12 = 6 inches.