Answer:
Part a) For each sandwich was used 1/4 of the baguette
Part b) One of Craig’s sandwiches is 3/4 ft long
Part c) One of Craig’s sandwiches is 9 in long
Step-by-step explanation:
Part a) What portion of the baguette was used for each sandwich?
we know that
The baguette is divided in 4 equally sized sandwiches
The baguette represent the 100%
so
Each sandwich represent

Convert to fraction number

therefore
For each sandwich was used 1/4 of the baguette
see the attached model to better understand the problem
Part b) How long, in feet, is one of Craig’s sandwiches?
we know that
Divide the total length of the baguette by the number of sandwiches
The total length of the baguette is 3 ft
The number of sandwiches is 4
so

therefore
One of Craig’s sandwiches is 3/4 ft long
Part c) How many inches long is one of Craig’s sandwiches?
we know that

Convert ft to in
To convert feet to inches multiply by 12

therefore
One of Craig’s sandwiches is 9 in long